Add user defined function to action.

Add legacy keymap support.

Fix tapping. tap key just after tap timeout.

Fix: action LAYER_BIT uses xor now instead of and/or.

Fix process_tapping().

Clean debug print in action.c.

Clean code.

Add tap toggle feature to action.

Add oneshot modifier action.

Fix keycodes. It has 32 Fn keys now.

Remove test_func.

New tapping logic.

Minor fixes in keyboard.c.

Add prototype of Action Function.

Add bootmagic keys.(hhkb)

- kick bootloader
- enable debug print

Fix mods with tapping.

Refactor struct keyevent_t.

Fix mods with tap key but some problems still exists.

- stuck tap key after tapping. seq[mods(d), key(d), mods(u), key(u)]
- tap key doesn't work when fast type. [key(d), mods(d), key(u),
  mods(u)]

Add support partly for modifier with tap key.

Fix waiting_keys and periodical update for delaying layer.