I tried the codebase against the new esp-idf 4 alpha code, and
the build didn't have exception handling enabled by default.
I saw no problems with modifying the code to not raise exceptions,
so I did so to be future-proof.

The exception cases were cases that should not happen anyway,
because the input that could trigger the exception has already
been validated on beforehand by the Python-based code generation.

Fixes #10
"When changing RGB color settings, while night light mode is active,
transitions don't look good. On many of the transitions, the light
level shows a significant drop."

This commit fully suppresses transitions when the light is in
night light mode.

Documentation and binary sensor code quality improvements.