Add files for onekey(issue #56)

- https://github.com/tmk/tmk_keyboard/issues/56
Merge branch 'onekey'
Add cli() to protoect ADB critical timing part
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
Disable BOOTMAGIC and fix debug prints of adb_usb
Remove tentative files from blargg