Added basic API definition & code structure
Initial API Design
Added comments and changed method name
Added comments and changed method name
Created adc.h
added adc.c
Added ADC shell files (c/h)
Implemented start peripheral and test for it
Merged conflict
Added some comments
Added additional tests
Added some additional peripherals
Fixed method declaration in headerfile
Removed unsigned int warning
Written untested functions for ADC
Written a simple test; init and ch_init good

Also removed foobar tests
Added API outline
Added doxygen style comments to API outline
added pio test outline
added description of how to implement pio init