Initial sleep implementation
Added power configuration to accelerometer

Conflicts:
	firmware/accel.c
	firmware/accel.h
	firmware/main.c
Renamed alphabet files to wave
Refactored glyph data into separate file
More Makefile tweaking
Fix OUTPUT_VALUE compiler warning

The issue involved the C language integer promotion rules.
Refactored display stuff into separate module
Refactored button code into separate module
Put accelerometer into standby mode when not in use
Configure display for low power when not in use
Move accel interrupt handling into accel module
Initial timer implementation

Timer 1 still needs some work
Enabling display now initializes LEDs to off
Initial refactor of wave module to better use timers
Merge branch 'oc/sleep'