Fixed handling of ADB event with key down and key up for same key all in one

Add HHKB keymap file on gh60

Support GH60 Rev.B PCB as well as Rev.A(issue #64)

- Port of col8 is PB0 in Rev.A while PB7 in Rev.B

Add parenthses ito macro arguments

Add SpaceFN layout to gh60

Add new keymap management on gh60

Merge branch 'ps2_mouse_fix'

Configure PS/2 mouse build options to onekey

Fix PS/2 USART version

Fix interrupt version of ps2.c

Add build options of ps2_mouse

Fix to build ps2_mouse with both LUFA and PJRC

- change API of ps2_mouse; ps2_mouse_task()
- remove mouse_report from host.c

Add PS/2 mouse configure to onekey

Fix delay of PS/2 mouse init

Wait for USB starting up to make debug print available

Remove tentative files from blargg

Disable BOOTMAGIC and fix debug prints of adb_usb

Fix ADB led_set(); remove delay

- the 100ms delay causes keystroke drop; this is observable with
  pressing Numlock key on AEK repeatedly
- without the delay LED sync problem doesn't occur now

Add cli() to protoect ADB critical timing part

Fix PS/2 mouse support