fixing equation box issue
saving state problem fixed
Merge branch 'master' into haoxuan3
Skeleton for getting state into the PM.
saving state revamped
Merge branch 'master' into haoxuan3
Code review for state:  changing whitespace.
Merge branch 'master' into haoxuan3
Code review for saving state.  I am unclear about the
changes to the pedagogical module.  In order to merge
the other changes, I took the master version of
js/pedagogical_module.js.  The modified version
can be found at commit 834fd14a524b7dcd16d60865da5d4aa78ae72019