Simplified BLDC function

Removed lots of functionality that would make the function general in order to make a simple working application.
Testing and bugfixing of basic PWM functionality complete.

The PWM generation and IO muxing seems to work. The signals toggle
correctly when cycling through the commutation scheme manually. Further
measurements must be done at high speed. The duty cycle controll is not
tested.

The commutation driver is still not implemented.
Simplified sys controller.
The command format was way to complicated. This is simplified o the
following:

uint8_t cmd		One command byte
uint8_t	pkgSize	The total size of the packet. Max 64 bytes
uitn8_t	payload[]	Max 62 bytes payload
Added StopBLDC function.
The function will turn off all output signal and stop the PWM generator.
Started to add some of the commutation control. Nothing remotely functional yet, only an empty process and some variables.