Allowing Tutorial 1 to detect which equation was selected.

Also renaming some of the tags.
Wont bug user for blocking the path if move is cancelled.
Tutorial1 now goes through the number select

Also, refactoring names of Tags
Set up stubs for the remainder of Tut 1-1
Stopped bugging the user when they correct a mistaken drag
Added upper case <Click>
Added in case for premature simplification

If the user types an answer, Tux will skip to his last piece about
entering the answer.
First branch of the 6-5 first tree
Tutorial 1-1 basically complete
Tut 1-1 handles quick enter

Handled bug where solving an equation too quick confused tux.  Open
question: Should user be able to back up from their first equation?