Change ACTION_LAYER_SET_LAYER behaviour

Add transparent layer feature in gh60

Now includes LUFA-120730 in repository

Add support for LUFA-120730

Boot Magic key for gh60

Merge branch 'keymap2'

Conflicts:
	common/keyboard.c

Fix and add some in README

Fix is_tap_key()

Add doc/keycode.txt

Merge branch 'gh60'

Add description of keymap and layer in README.md

Clean layer actions.

Add macro feature.

Support for ISO/JIS keys on ADB(Issue#22)

- ISO/JIS specific keys support.(Not tested :)
- Learned how to convert ADB into HID code from:
  http://www.opensource.apple.com/source/IOHIDFamily/IOHIDFamily-421.18.3/IOHIDFamily/Cosmo_USB2ADB.c
- Left of 1 key generates 0x0A(ADB scan code) on German layout AEKII.

Add user defined function to action.

Add legacy keymap support.

Fix tapping. tap key just after tap timeout.

Fix: action LAYER_BIT uses xor now instead of and/or.

Fix process_tapping().

Clean debug print in action.c.