Fixes to sleep LED.

Add help text.
Add missing SLEEP_LED_ENABLE checks.
Update Phantom debug print

This updates the Phantom project to use the new debug print functions.
Correct order of rows for Phantom
Fix Phantom sleep LED.
Move Phantom keymaps to separate header files.
Add Phantom README.
Merge pull request #36 from Wraul/fix_sleep_led

Fixes to sleep LED
Merge pull request #37 from Wraul/update_phantom

Polishing the Phantom project