Initial commit for UART functionality
Initialization should work, NOT TESTED!
USART2 en UART 4 initalization complete. NOT TESTED
Made UART usage universal. Just working for UART2 and UART4
UART 2 and UART 4 setup and working.

! RX not tested !
Updated .gitignore
UART optimalisations
UART code complete
Ready for merge to master
Merge branch 'UART'

Conflicts:
	cmsis_boot/stm32f4xx.h
	drHUmmer.coproj
	main.c
Including UART in main.h