dev/lcd/font: move single-pixel letter space to end of character
dev/can/can: remove duplicate assignment
dev/lcd/lcd: make some funcs not static; remove sprite function
dev/lcd/gfx: implement pixel, line and rectangle gfx functions
dev/lcd/font: move inter-letter space before the letter
dev/can/mcp2515: temporarily use one-shot mode to avoid errors
obd/obd: implement mph history graph