add github URL in README.

version 1.0.

add mouse acceleration.

add mouse wheel function.

add mouse function.

some fixes. LED flush for debug.

ver 0.2

add jump_bootloader.

divide usb_keyboard_debug.[c|h] into usb_device, usb_keyboard, usb_debug.

delete unused KEY_* definitions.

simple keymap layers.

add anti-ghost logic

perform nomal keyboard behavior. It works now!!!

store Keymap into program space.

matrix scan & default keymap

change file name.

add initial files from teensy's usb_keyboard_debug.