Fixed uart code for use with the FSU.  Changed debug uart to U1 to correspond
with connections on FSU.  Isolated problem in UART transmission to ringbuffer issue.
The ringbuffer seems to only return 0. I forced the UART to transmit 0x55 currently
to verify that it is working.  Further debugging needed.
Merging upstream

Merge branch 'dev' of github.com:WellDone/MoMo-Firmware into dev
Fixed one ringbuffer error