* Modularity and gcc warnings fixes.

* Add ChibiOS support (USB stack + support files).

* Make usb_main more USB_DRIVER #define independent.

* Move chibios to tool.

* Implement jump-to-bootloader.

* Small updates.

* Fix bootloader-jump compiling.

* Move AVR specific sleep_led.c into avr.

* Add basic sleep_led for chibios.

* Update chibios README.

* NKRO fixes.

* Rename some Makefile defines.

* Move STM32 bootloader address config to separate .h file.

* Add ARM Teensies bootloader code.

* Fix chibios/usb_main GET_REPORT handing.

* Add missing #include to keymap.c.

* Make bootmagic.c code portable (_delay_ms -> wait_ms).

* Move declaration of keymap_config.

Should really not declare variables in .h files - since it's included
in different .c files, a proper linker then complains that the same
variable is declared more than once (once for each .c file that the
offending .h is included in).

* Add eeprom support for chibios/kinetis.

* Rename chibios example keyboard.

* Move chibios/cortex selection to local Makefiles.

* Chibios: use WFI in idle. WIP suspend stuff.

* ChibiOS/kinetis: sending remote wakeup.

* ChibiOS/STM32: send remote wakeup.

* Fix report size of boot protocol.

* Fix drop key stroke

Keyboard report should be checked if its transfer finishs successfully.
Otherwise key stroke can be missing when other key event occurs
before the last report transfer is done.

Boot protocol 10ms interval probably causes this problem in case
it receives key events in a row within the period. NKRO protocol
suffers less or nothing due to its interval 1ms.

* Chibios/usb_main: rename a variable for clarity.

* Add correct chibios/bootloader_jump for infinity KB.

* ChibiOS: make reset request more CMSISy.

* Chibios: Add breathing sleep LED on Kinetis MCUs.

* ChibiOS: Update infinity bootloader code to match updated ChibiOS.

* ChibiOS: prettify/document sleep_led code.

* Chibios: Remove the wait in the main loop.

* Add maple mini code.

* Do timeout when writing to CONSOLE EP queue.

Fixes TMK bug #266.

* Chibios: add 'core/protocol' to the makefiles' search path.

* Chibios: Update to new USB API.

* Chibios: add more guards for transmitting (fix a deadlock bug).

* Add update for chibios in README

* Chibios: Fix a HardFault bug (wait after start).

* Chibios: cleanup usb_main code.

* Chibios: Revert common.mk change (fix AVR linking problem).

* core: Fix chibios user compile options

Compile options can be defined in project Makefile such as UDEFS, UADEFS, UINCDIR, ULIBDIR and ULIBS.

* Sysv format for ChibiOS arm-none-eabi-size

Some new patches to ChibiOS puts heap as it's own section. So the
berkeley format is now useless, as the heap will be included in the
BSS report. The sysv format displays the bss size correctly.

* Fix hard-coded path of CHIBIOS

* Add support for new version of ChibiOS and Contrib

The Kinetis support has moved to a separate Contrib repository in
the newest version of Chibios. There has also been some structure
changes. So this adds support for those, while maintaining back-
wards compability.

* Update ChibiOS instructions

* Chibios: implement sleep LED for STM32.

* Chibios: Update the main chibios README.

* Chibios: fix STM32_BOOTLOADER_ADDRESS name.

* Chibios: make the default bootloader_jump redefinable (weak).

* Chibios: disable LTO (link-time optimisation).

With LTO enabled, sometimes things fail for mysterious reasons
(e.g. bootloader jump on WF with LEDs enabled), just because the
linker optimisation is too aggressive.

* Chibios: add default location for chibios-contrib.

* ChibiOS: update mk to match chibios/master.

* ChibiOS: update instructions.md.

* Add chibi_onekey example.

* Add comments to chibi_onekey Makefile.

* Rename some Makefile defines.

* Move STM32 bootloader address config to separate .h file.

* Rename chibios example keyboard.

* Move chibios/cortex selection to local Makefiles.

* Add Teensy LC onekey example.

* Chibios: use WFI in idle. WIP suspend stuff.

* Update chibi/teensy instructions.

* Update chibios/Teensy instructions.

* Add infinity_chibios

* Add keymap_hasu.c

* Infinity_chibios: select correct bootloader_jump.

* Infinity_chibios: improve comments.

* Add generic STM32F103C8T6 example.

* Add maple mini code.

* STM32F103x fixes.

* Add maple mini pinout pic.

* Chibios: updates for 3.0.4 git.

* Chibios: rename example stm32_onekey -> stm32_f072_onekey.

* Chibios: add makefiles for Teensy 3.x examples.

* Chibios: update Teensy 3.x instructions.

* Chibios: Tsy LC is cortex-m0plus.

* Chibios: add more guards for transmitting (fix a deadlock bug).

* Change README for chibios

* Chibios: update examples to current chibios git.

Match the changes in mainline chibios:
 - update chconf.h
 - update supplied ld scripts structure
 - update Teensy instructions (switch to official
    chibios and introduce contrib)

* Add ChibiOS and ChibiOS-Contrib submodules

Also fix the makefile path for them.

* Moves chibios keyboards to keyboards folder

* First version of ChibiOS compilation

Only the stm32_f072_onkey keyboard is ported at the moment. It
compiles, but still doesn't link.

* More chibios fixes

It now compiles without warnings and links

* Move the teensy_lc_onekey to the keyboards folder

* Clean up the make file rule structure

* Remove keymap_fn_to_action

* Update more ChibiOS keyboards to QMK

Most of them does not compile at the moment though.

* Use older version of Chibios libraries

The newest ones have problems with compilation

* Remove USB_UNCONFIGURED event

It isn't present in the older version of ChibiOS

* Fix the infinity_chibios compilation

* Fix potentially uninitialized variable

* Add missing include

* Fix the ChibiOS makefile

* Fix some Chibios keyboard compilation

* Revert the rules.mk file back to master version

* Combine the chibios and AVR makefiles

With just the required overrides in the respective platform
specific one.

* Slight makefile restrucuring

Platform specific compiler options

* Move avr specific targets out of the main rules

* Fix ChibiOS objcopy

The ChibiOS objcopy needs different parameters, so the parameters
are moved to the corresponding platform rule file

* Fix the objcopy for real this time

The comands were moved around, so chibios used avr and the ohter
way around.

Also change the objsize output format

* Fix the thumb flags

* Fix the infinity hasu keymap

* Per platform cpp flags

* Add gcc-arm-none-eabi package to travis

* Add arm-none-eabi-newlib to travis

* Fix the name of the libnewlib-arm-none-eabi lib

* Fix the ChibiOS paths

So that they are properly relative, and builds don't generate
extra folders

* Fix the board path of stm32_f103_onekey

* Only consider folders with Makefiles as subproject

* non-working commit

* working

* subprojects implemented for planck

* pass a subproject variable through to c

* consolidates clueboard revisions

* thanks for letting me know about conflicts..

* turn off audio for yang's

* corrects starting paths for subprojects

* messing around with travis

* semicolon

* travis script

* travis script

* script for travis

* correct directory (probably), amend files to commit

* remove origin before adding

* git pull, correct syntax

* git checkout

* git pull origin branch

* where are we?

* where are we?

* merging

* force things to happen

* adds commit message, adds add

* rebase, no commit message

* rebase branch

* idk!

* try just pull

* fetch - merge

* specify repo branch

* checkout

* goddammit

* merge? idk

* pls

* after all

* don't split up keyboards

* syntax

* adds quick for all-keyboards

* trying out new script

* script update

* lowercase

* all keyboards

* stop replacing compiled.hex automatically

* adds if statement

* skip automated build branches

* forces push to automated build branch

* throw an add in there

* upstream?

* adds AUTOGEN

* ignore all .hex files again

* testing out new repo

* global ident

* generate script, keyboard_keymap.hex

* skip generation for now, print pandoc info, submodule update

* try trusty

* and sudo

* try generate

* updates subprojects to keyboards

* no idea

* updates to keyboards

* cleans up clueboard stuff

* setup to use local readme

* updates cluepad, planck experimental

* remove extra led.c [ci skip]

* audio and midi moved over to separate files

* chording, leader, unicode separated

* consolidate each [skip ci]

* correct include

* quantum: Add a tap dance feature (#451)

* quantum: Add a tap dance feature

With this feature one can specify keys that behave differently, based on
the amount of times they have been tapped, and when interrupted, they
get handled before the interrupter.

To make it clear how this is different from `ACTION_FUNCTION_TAP`, lets
explore a certain setup! We want one key to send `Space` on single tap,
but `Enter` on double-tap.

With `ACTION_FUNCTION_TAP`, it is quite a rain-dance to set this up, and
has the problem that when the sequence is interrupted, the interrupting
key will be send first. Thus, `SPC a` will result in `a SPC` being sent,
if they are typed within `TAPPING_TERM`. With the tap dance feature,
that'll come out as `SPC a`, correctly.

The implementation hooks into two parts of the system, to achieve this:
into `process_record_quantum()`, and the matrix scan. We need the latter
to be able to time out a tap sequence even when a key is not being
pressed, so `SPC` alone will time out and register after `TAPPING_TERM`
time.

But lets start with how to use it, first!

First, you will need `TAP_DANCE_ENABLE=yes` in your `Makefile`, because
the feature is disabled by default. This adds a little less than 1k to
the firmware size. Next, you will want to define some tap-dance keys,
which is easiest to do with the `TD()` macro, that - similar to `F()`,
takes a number, which will later be used as an index into the
`tap_dance_actions` array.

This array specifies what actions shall be taken when a tap-dance key is
in action. Currently, there are two possible options:

* `ACTION_TAP_DANCE_DOUBLE(kc1, kc2)`: Sends the `kc1` keycode when
  tapped once, `kc2` otherwise.
* `ACTION_TAP_DANCE_FN(fn)`: Calls the specified function - defined in
  the user keymap - with the current state of the tap-dance action.

The first option is enough for a lot of cases, that just want dual
roles. For example, `ACTION_TAP_DANCE(KC_SPC, KC_ENT)` will result in
`Space` being sent on single-tap, `Enter` otherwise.

And that's the bulk of it!

Do note, however, that this implementation does have some consequences:
keys do not register until either they reach the tapping ceiling, or
they time out. This means that if you hold the key, nothing happens, no
repeat, no nothing. It is possible to detect held state, and register an
action then too, but that's not implemented yet. Keys also unregister
immediately after being registered, so you can't even hold the second
tap. This is intentional, to be consistent.

And now, on to the explanation of how it works!

The main entry point is `process_tap_dance()`, called from
`process_record_quantum()`, which is run for every keypress, and our
handler gets to run early. This function checks whether the key pressed
is a tap-dance key. If it is not, and a tap-dance was in action, we
handle that first, and enqueue the newly pressed key. If it is a
tap-dance key, then we check if it is the same as the already active
one (if there's one active, that is). If it is not, we fire off the old
one first, then register the new one. If it was the same, we increment
the counter and the timer.

This means that you have `TAPPING_TERM` time to tap the key again, you
do not have to input all the taps within that timeframe. This allows for
longer tap counts, with minimal impact on responsiveness.

Our next stop is `matrix_scan_tap_dance()`. This handles the timeout of
tap-dance keys.

For the sake of flexibility, tap-dance actions can be either a pair of
keycodes, or a user function. The latter allows one to handle higher tap
counts, or do extra things, like blink the LEDs, fiddle with the
backlighting, and so on. This is accomplished by using an union, and
some clever macros.

In the end, lets see a full example!

```c
enum {
 CT_SE = 0,
 CT_CLN,
 CT_EGG
};

/* Have the above three on the keymap, TD(CT_SE), etc... */

void dance_cln (qk_tap_dance_state_t *state) {
  if (state->count == 1) {
    register_code (KC_RSFT);
    register_code (KC_SCLN);
    unregister_code (KC_SCLN);
    unregister_code (KC_RSFT);
  } else {
    register_code (KC_SCLN);
    unregister_code (KC_SCLN);
    reset_tap_dance (state);
  }
}

void dance_egg (qk_tap_dance_state_t *state) {
  if (state->count >= 100) {
    SEND_STRING ("Safety dance!");
    reset_tap_dance (state);
  }
}

const qk_tap_dance_action_t tap_dance_actions[] = {
  [CT_SE]  = ACTION_TAP_DANCE_DOUBLE (KC_SPC, KC_ENT)
 ,[CT_CLN] = ACTION_TAP_DANCE_FN (dance_cln)
 ,[CT_EGG] = ACTION_TAP_DANCE_FN (dance_egg)
};
```

This addresses #426.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

* hhkb: Fix the build with the new tap-dance feature

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

* tap_dance: Move process_tap_dance further down

Process the tap dance stuff after midi and audio, because those don't
process keycodes, but row/col positions.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

* tap_dance: Use conditionals instead of dummy functions

To be consistent with how the rest of the quantum features are
implemented, use ifdefs instead of dummy functions.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

* Merge branch 'master' into quantum-keypress-process

# Conflicts:
#	Makefile
#	keyboards/planck/rev3/config.h
#	keyboards/planck/rev4/config.h

* update build script

* non-working commit

* working

* subprojects implemented for planck

* pass a subproject variable through to c

* consolidates clueboard revisions

* thanks for letting me know about conflicts..

* turn off audio for yang's

* corrects starting paths for subprojects

* messing around with travis

* semicolon

* travis script

* travis script

* script for travis

* correct directory (probably), amend files to commit

* remove origin before adding

* git pull, correct syntax

* git checkout

* git pull origin branch

* where are we?

* where are we?

* merging

* force things to happen

* adds commit message, adds add

* rebase, no commit message

* rebase branch

* idk!

* try just pull

* fetch - merge

* specify repo branch

* checkout

* goddammit

* merge? idk

* pls

* after all

* don't split up keyboards

* syntax

* adds quick for all-keyboards

* trying out new script

* script update

* lowercase

* all keyboards

* stop replacing compiled.hex automatically

* adds if statement

* skip automated build branches

* forces push to automated build branch

* throw an add in there

* upstream?

* adds AUTOGEN

* ignore all .hex files again

* testing out new repo

* global ident

* generate script, keyboard_keymap.hex

* skip generation for now, print pandoc info, submodule update

* try trusty

* and sudo

* try generate

* updates subprojects to keyboards

* no idea

* updates to keyboards

* cleans up clueboard stuff

* setup to use local readme

* updates cluepad, planck experimental

* remove extra led.c [ci skip]

* disable power up for now

* config files updates

* makefile updates

* .h file updates, config tuning

* disable audio for yang

* fixes from tmk's repo

* rename keyboard to keyboards

* adds support for GH60 Satan keyboard

ANSI 125 layout, capslock and backlight implemented, support for
WS2812LED strip included

* added Phantom and GH60 Satan to travis

* .build containment implemented

* no destructive variable setting - builds in either folder

* make from 3 places

* cleans before each build
* make from root with keyboard=keyboard, keymap=keymap
* make from keyboard/keyboard with keymap=keymap
* make from keymaps/keymap
* only implemented on planck

* adds color diag to avr-gcc

* makefiles for all plancks, clean-up

* quick build-all makefile for plancks

* reformatting of make output (colors)

* color toggle, tmk path corrections

* correct if statement for color

* move config.h to main makefile, updates preonic, atomic

* format update, all keyboards targets

* makefile optional for build all target, alps and arrow_pad updated

* alps updated

* make planck default, trying out travis recipe for all-keyboards

* all-keymaps target, different travis recipe

* updates alps64

* updates keyboards to new format

* updates clue* projects

* all projects updated, specialise EZ .hex, let .hex through

* updates travis

* automatically find root, keyboard, keymap

* silent echo, cleaned-up mass make output

* updates all keyboards' .hex files except EZ

* Rename Bantam44.c to bantam44.c

* Rename Bantam44.h to bantam44.h

* nananana

* adds six key keyboard

* does same to ez as rest

* updates send_string example

* brings ergodox_ez up to date

* updates template/new project script

* adds sixkeyboard

* adds readme for sixkeyboard

* adds sixkeyboard to travis

* filenames, gitignore mess

* define clock prescaler stuff manually

* make quick, size test example

* documentation and dfu-no-build