Merge pull request #781 from code-dot-org/optimize_user_stats

Optimize user stats
Automatically built: commit 6ecb78573f2a7785ae4fb2ab1223b1a25065ac29
Author: cpirich <chris@code.org>
Date:   Tue Jun 10 21:36:31 2014 -0700

    studio bugfix for IE: use parentNode instead of parentElement
Merge pull request #792 from code-dot-org/finished

deploy to delivered