Fix teacher progress browser perf by only fading each progress bar once.
Merge branch 'finished' of github.com:code-dot-org/dashboard into finished
Merge branch 'finished' into delivered
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Merge pull request #840 from code-dot-org/finished

DTD
Remove apparently unused gems.
Added back.
Remove coffee-script since we don't use it.
show a nice error message when attempting to join your own section instead of 500ing
Remove secret.
add bounce to 2-3 script
deprecate username for new users that have either email address or oauth (all except the current sponsored students)
use first name instead of username in Hi menu
Merge pull request #841 from code-dot-org/bounce23

add bounce to 2-3 script
Merge pull request #842 from code-dot-org/cleanup-followers-sections

show a nice error message when attempting to join your own section inste...
Merge pull request #843 from code-dot-org/deprecate-username-for-new-users

Deprecate username for new users
Merge pull request #844 from code-dot-org/finished

deploy to delivered
Merge branch 'delivered'