let's get started on the F0. stdperiph/cmsis integrated. basic config changes
stdperiph include paths
break out traits to mcu-specific files
gpio library files compilable
nvic compatibility changes for the reduced functionality on the f0
rcc changes for f0
exti interrupts (exti not yet complete)
exti peripheral conversion to f0
Merge remote-tracking branch 'bluehost/master' into f0_51
rtc changes for f0
Merge branch 'master' into f0_51
timers for the f0
mutex not available on f0 due to strex and ldrex not in core
moved mutex to concurrent folder and remove dupe header in util
Merge branch 'master' into f0_51
dma on the f0
first f0 clean build
mods to ensure inclusion from C compilations
it's always a bit of a celebration when blink works for the first time on a new MCU
minor f1 regression