Add required block editing.
Update test to work with single param toolbox method.
Artist required blocks.
method call fix.
Merge pull request #591 from code-dot-org/required-blocks

Required blocks.
Docs about varnish
Automatically built.
Use YouTubeEducation.com instead of YouTube.com again. Disable fallback player.
Merge pull request #621 from code-dot-org/use_youtubeeducation_again

Use YouTubeEducation.com instead of YouTube.com again. Disable fallback player.
Merge branch 'finished' of github.com:code-dot-org/dashboard into finished
Merge pull request #623 from code-dot-org/finished

Deploy to delivered