Added API outline
Added doxygen style comments to API outline
added pio test outline
added description of how to implement pio init
Updated register addresses, now uses offsets
Renamed digital_io -> pio, finished conf_port & conf_pin
bugfix
Fixed compiler errors & removed test_pio
Wrote a test
minor fixes
Added tests and 2/2 passed
Merge branch 'pio' into pio-theo
Added pio_set_pin/port... yet to be tested
Added tests for reading and setting pin levels
Fixed merge conflicts
Added soded as author
fixed ports to be uint32_t types
Wrote code for pio_init
added documentation and updated .gitignore
Added Soded as author and changed date