* base envs

* CI: speed up release process (since we still want some .bin files)

* fixup! CI: speed up release process (since we still want some .bin files)

* release dry run

* fixup! release dry run

* adjust

* fix .bin name

* it works

* minor cleanup for current git

* use pio suggestion about ldscript, reduce build_flags impact

* fix linker

* parse ${vars} instead of ignoring them

* add filtering and override file (sneak peak into tasmota's pio config)

* don't generate secure client (for now)

* formatting

* codacy

* test: restore webui builds in travis

* show build.sh usage via -h, exclude build stage instead of explicitly including it

* utils/version: use git description token as version, add memoization

* pio: move extra scripts to a separate directory

* pio: add -DAPP_REVISION=... as local build flag

- update file paths: .pioenvs -> .pio/build, .piolibdeps -> .pio/libdeps
- modify envs to use common settings
- enable shared libs in travis and ota scripts

* Change git detection to not accidentaly exit the shell
* Fix [ $par_build ] always being true
* Fix git-describe with shallow clone ("No tags can describe ...")

- Revert test to being serial. Releases are using parallel jobs.
- Some cosmetic changes in build.sh