Added license.
Fixes #20
Capitalization
Added Return key.
Added other key equivalent symbols.
Removed second "⌦" symbol from Delete menu item.
Added convenience method for adding new power key replacement to menu.
Added constants for the 0xDEAD and 0xC0DE tags.
Merge branch 'next' into script

Conflicts:
	PowerKey/PKPreferencesController.h
	PowerKey/PKPreferencesController.m