Fix use of default_layer

Fix layer switching and host API.

Add subset of Xorg MouseKey acceleration parameters.

Fix build option MOUSEKEY_ENABLE.

Clean host.h interface.

Add keycode.h and remove usb_keycodes.h.

Add consumer/system usage support.

Add repeating of Fn key with alt keycode.

changes function name keyboard_proc to keyboard_task

Initial version of new code for layer switch is added.

Fix: Makefile

Fix MCU name macro in bootloader.c.

ADB conveter uses plain vanila keymap now.

Merge pull request #8 from JeffreySung/master

Apple IIgs(A9M0330)/Standard(M0116) keyboard

Fix PS/2 protocol build options

Debounce bug fixed

Power key support

debounce issue exists

Change keymap of ADB converter.

To prevent key stuck clear matrix array when ADB error occurs.

ad hoc fix for wrong bit read problem of adb.c.