Created development branch
Started FreeRTOS import
Corrected build script for FreeRTOS
Verified FreeRTOS project config
UART task reads from queue puts message
Refactoring. Preparing to add UART Rx interrupts.
Fixed config (clock freq), UART TX and RX
Interpreting UART Rx input; preparing for commands.
Added testing.{c,h} to interpret test commands
Added argument handling to shell.
Stripped demo code. Added Uart1.
Attempting to run FreeRTOS on dev board
UART works (with bugs) on dev board with RTOS
Added some uart radio commands.
Added wire, payload, and power module skeletons.
Added new serial.c implementation, fixes UART bug.
Added two software impelementations of I2C

I added two implementations of bit-banging I2C to the codebase.  This
code needs a major cleanup, but it works for now.
Refactored software I2C code
Fixed 9DoF demo
Created I2C queue and test code.