- rewrote the layer functions in main() (easiest way to get the to
work.. :) )
- fixed the keymap (i had the numpad keys pushing layer 2 instead of
layer 3)
- changed the numlock keycode.. i was using the wrong one, lol
- and some minor aesthetic changes
- linked lists need to be rewritten to be more memory efficient
- all kbfun functions are now of type `(void kbfun_...(void))`, and the
arguments they need are passed via a group of global `main_arg_...`
variables (and other `main_...` variables)
