Wrote first draft of API
Added tft.c and updated tft.h
Added variables to the tft_instance struct
changed parameter lists in tft.c/h
Merge branch 'integration' into tft-display
Merge branch 'integration' into tft-display
Added bus functions and the init function
Renamed parameters in tft api
Added set_xy to tft api
Added a function that clears the screen
Added a function that writes a pixel to the screen
added tft tests
fixed warnings in tft.c and tft.h
merged integration with tft-display
Merge branch 'tft-display' into integration