Merge branch 'compile-time-preferences'

Merge branch 'compile-time-preferences'

Adds overridable C preprocessor definitions for every user preference.
Enables the user to set defaults and omit the preferences face.

The default behavior of the watch is preserved.

Suggested-by: Wesley Aptekar-Cassels <me@wesleyac.com>
Implemented-by: madhogs <x3dh4vhf@duck.com>
Reviewed-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/295
GitHub-Related-Issue: https://github.com/joeycastillo/Sensor-Watch/issues/291