SynthModules

I took the advice and replaced my previous program with the latest
code with the timer functionality.  I've added revision history to
the program to keep track of changes.

I've added additional initialization (such as outputs, led) and
added a 1mS timer interrupt.  This functionality can be used to
timestamp the receipt of MIDI data.  Note that this program so
far is just the core drivers.

I've added a simple loop-through mode for testing purposes.  It uses
the timer interrupt to blink the leds - one for MIDI data received,
the other for health.

Dave