created show notes for frozen videos
do not allow changing only case when editing level name
better error message
Update copyright for Angry Birds and Plants vs. Zombies
Fix 2012 copyright
fix when "Birds" is not the word immediately after "Angry"
Fix typo
Merge pull request #583 from code-dot-org/hourofcode

hourofcode.com translations
modify hoc.com/az/resources
i18n partner logos
student edge partner logo
fix hoc.com portuguese from hora de codigo to hora do codigo
add concepts to frozen videos for show notes
Merge pull request #584 from code-dot-org/frozenshownotes

show notes for frozen videos
Hotfix: Don't display social links on csedweek.org.
Merge branch 'test' into staging
webapp: new APIs
modify frozen video concepts
Merge pull request #582 from rhc2104/fix-typo

Fix typo
Merge pull request #578 from code-dot-org/no-case-change-level

do not allow changing only case when editing level name