Major improvements to GlassKeyboard

Launch activities such as Settings, GlassSettings, and Launchy
    using single keys. Press 'i' for help. Activity launches will
    now wake the screen. This is accomplished by executing a
    superfluous keyevent before launching. Also cosmetic touch-ups:
    type correction, deleting commented code. (Take 3)
Also  Renaming glass-keyboard glass_keyboard.py