Moved font data out so it can be used by other display implementations
as well.
Fixing documentation, updated width limit in image generation utility.
Adding support for two pin serial and interrupt driven input.
Only compile UART code if UART_ENABLED is set. Changed name of define
to match others in hardware.h.
Fixed bugs with receive buffer management, cleaned up timing
definitions (and allowed for ISR setup time) and changed the default
pin definitions.