1) add missing call to BlockController.onPause() / onResume() to the Tutorial activity2) rearrange BlockController's error reporting to make the case where the MessageSender thread has died separate3) in such case, resurrect the thread4) simplify and harden the EffectMessageSender
Abstract the part that controls the 'Locked' and 'Back Moves' buttons from the two activities: the main one and the tutorial one.This code had been duplicated there.
Cube Control: step 2.
Rename 'state' to 'screen'
Rename packages