add keymap layer: Matias half keyboard style(SPACE) [NOT USED]

hhkb: refactored

FIX: clear keyboard_keys.
NOT change layer when one more Fn keys pressed/other than Fn key pressed

add directories for each keyboard: hhkb, macway

add horizontal mouse wheel

';' for Fn key: send ';' when key realease without using the layer

change keymap.

make input ports(PE6,7) *with pullup*.

add HHKB docs and pics.

change keymap for mouse keys.

HHKB support.

change matrix pinouts.

add layer diagrams.

change pins of matrix rows. (teensy is installed inside of keyboard case.)

add github URL in README.

version 1.0.

add mouse acceleration.

add mouse wheel function.

add mouse function.

some fixes. LED flush for debug.