Fix top speed and gm on / off nil error. Implement hover with levitate (waterwalk and all)

Fixed various buttons and commands as well as implemented enter and esc to get focus off from an input. Blizzlike behaviour would be that a frame's buttons will clear forcus from the frame's inputs

remove some debug code of mine
Merge pull request #18 from Rochet2/master

Fixed a bunch of buttons and some errors and such
Update CREDITS.txt

Added Rochet2 to the credits file.