Temporary understated press launch morning links to frozen tutorial on code.org/learn and studio.code.org.
Wording fixups for Frozen launch.
Merge branch 'staging' into frozenlaunchlinks
String improvement for hoc beta message.
update of frozen intro video thumbnail
Merge pull request #480 from code-dot-org/frozenlaunchlinks

Temporary launch morning links to frozen tutorial
add hoc_2014_try strings to all locales
Unhide new tutorial scripts
Merge pull request #484 from code-dot-org/staging

DTT
fix unit test to unhide frozen and hourofcode scripts
DTT
fix unit test user_test
Merge pull request #485 from code-dot-org/test

DTP