Update da.coffee

Added a few of the missing translations.
Update diplomat.jade

Added my name to the contributors list.
Merge pull request #585 from Silwing/patch-1

Update da.coffee
Fixed issue with video on multiplayer page modal
Merge pull request #586 from adi2412/master

Fixed issue with video on multiplayer page modal
Removed a TODO.
Merge branch 'master' of https://github.com/codecombat/codecombat
Merge branch 'master' into production