Added API method for T2 and T3 screens to toggle the mode with which the GUI is opened (sneak or non-sneak) for touch driven programs. Closes #433.
Merge branch 'master' of github.com:MightyPirates/OpenComputers
Merge branch 'master' of github.com:MightyPirates/OpenComputers into master-MC1.7.10

Conflicts:
	src/main/scala/li/cil/oc/common/block/Keyboard.scala
	src/main/scala/li/cil/oc/common/block/Screen.scala
Properly sync touch mode when first sending screen state to clients.
Merge branch 'master' of github.com:MightyPirates/OpenComputers into master-MC1.7.10