Tutorial farm should be done.

Tutorial farm is done for the most part. Play through it to make sure it
doesn't break anywhere. It seems that clicks stop working after it
finishes...

Also, early code for doing score calculation is in.
Bug fix for tutorial disabling clicks.

I believe this means we have a hidden bug... turning off game clicks in
the tutorial screen should not affect other screens.
Merge remote-tracking branch 'origin/master' into adam_branch