Merge pull request #415 from codecombat/master

Merge master into production
Merge pull request #421 from codecombat/master

Merge master into production
Merge pull request #423 from codecombat/master

Merged master into production
Merge branch 'master' into production
Merge branch 'master' into production
Merge pull request #444 from codecombat/master

Master into production
Merge pull request #449 from codecombat/master

Master into production
Merge pull request #462 from codecombat/master

Merge master into production
Merge pull request #463 from codecombat/master

Merge ladder view into production
Level now uses the universal wizard thang type.
Removed a link to the old team view.
Removed the old team view cruft.
Created hasWriteAccess on Cocomodel, used it for level access
Corrected link to view your own matches in leaderboard view.
Added team icons to the ladder play view.
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/templates/play/ladder/ladder_tab.jade
Merge branch 'master' of https://github.com/codecombat/codecombat

Conflicts:
	app/templates/play/ladder/ladder_tab.jade
Live leaderboard updating
Disabled buttons for non-owners in Article Editor
Fixes for ladder refreshing.