- Makefile use LUFA now
- Change MCU ports PF{0,1} to PD{0,1}
- Add build option for keymap to Makefile: make keymap=hasu

- rewrite special key handling in m0110.c
- add mouse keys to keymap

- README is written with markdown notation.
- m0110.c can handles Arrow keys and Calc keys of M0110A.
- EXTRAFLAGS and EXTRALDFLAGS are added in rules.mk to give flags on make command line.

ADD: Build option: MATRIX_HAS_GHOST to enable ghost blocking logic.
FIX: choose matrix buffer type(uint8_t/uint16_t) automatically
     depending on column size in matrix.c.
FIX: use uint8_t insted of int in matrix.c.

Change build options:  Makefile and config.h. See README.