Added PS/2 multimeda key support.
HID Consumer page and System control are also supported now.
merged mediakey branch: d53a356cd2011b461843a5c7c1527a61692893c1
added HHKB/README and clean some codes.
added USB_EXTRA feature to HHKB/V-USB
added initial V-USB support for HHKB
move files: main_vusb.c ps2_usart.c sendchar_usart.c from ps2_usb to common dir
fix bug: send Fn key even after the layer is used.
ad hoc fix for IDLE bug which affects on Mac only.
fix for ps2_usb Makefile and circuit
minor fix for HHKB Makefile and doc
FIX: send last report when idle timeouts. (pjrc)
ADD: V-USB Circuit in README
FIX: host_get_first_key in vusb/host.c
fixed hhkb to comply new API.
fixed macway to comply new API.
fixed adb_usb to comply new API.
integrate V-USB support into ps2_usb
Synchronous USART support for PS/2 on V-USB stack
PS/2: request to resend when error is occured.
fixed: not to send key if fn_keycode is modifier