Add initial video test page. Make video fallback player params more flexible to support it.
Honor youtube base URL override
Prepopulate form
Handle video fallback player with no notes tab to open
Use cleaner way of temporary base url overriding and fallback disabling
Pass along fake blocking string to form
Remove old parameter reference
Remove unused statement
Formatting of detectflash method
Change wording
Make text larger
Merge pull request #637 from code-dot-org/video_test_page

Video test page
Automatically built.
Level edits
Add match.en.yml and multi.en.yml to git after all, so that all production machines have them.
Merge branch 'finished' of github.com:code-dot-org/dashboard into finished
Merge branch 'finished' of github.com:code-dot-org/dashboard into finished
fix step script
Level edits
fix typo in comment