UART TX DMA code
Fixing minor warnings
Fixing MPLAB X project, replacing missing Makefile
File changes, to facilitate merge with uart-dma
Merge branch 'uart-dma'

Conflicts:
	Makefile
	nbproject/Makefile-default.mk
	nbproject/Makefile-genesis.properties
	src/main.c
	src/xbee_handler.c
Ongoing porting to use latest spicontroller, radio code, bsp, etc