Merge pull request #115 from nanan9177/master

Updated instruction Maze 2_8 and 2_10.
Revert "New translation help link"

This reverts commit 595fd3fad30c11bb4709f0784d36d029c7b19c34.
Fix up video titles (capitalization, no acronyms)
Translations
Enable spanish on staging
Configure language->locale expansions
Increase memory available to VM
Eat white space causing misalignment
Move bulk of user stats to a partial, and add new header to full page version
Use the blockly-apps version, instead of git revision for cache busting.
Translations
Merge pull request #117 from brandonbloom/cache-bust-again

Use the blockly-apps version, instead of git revision for cache busting.
remove extra "end"
Add user stats report to root page
Text tweaks
Update recent activity UI
Added level specific feedback to data.en.yml.
Root page UI updates
Added the function to go back to previous level.
fix CSS to fix level links on top page