PS/2 and trackpoint disabled when not defined.
Mousekeys should still work
makefile logging split
MouseUsage[] can be used in new structure.
MALTRON_KW: config added and relevant parts restructured, mainly in keymap:

 - CMD_MODE() in keymap.h
 - ROWS/COLS/LAYERS defines per board

Can still be built for Hypernano, where everything still seems to work.

@todo: PS2 and trackpoint support should be automatically compiled if necessary.
PS2 & trackpoint support selected based on keyboard hardware defined in makefile