Added i18n coverage logic to the CocoModel.
Merge branch 'master' of https://github.com/codecombat/codecombat
Added i18nCoverage backend support.
Several improvements to the victory modal.
Swap problem alert error message and hint lines

Also fixing problem alert border on Firefox.
Fixed #1567

Moved the code diff control to the top of the list, and added a short
instructional message.
Merge pull request #1695 from yjw9012/master

Fixed #1567
Merge branch 'master' of https://github.com/codecombat/codecombat
Fixed point and region choosers in the level editor.
Fixed debug, and some other mark issues when sprite sheets update, most likely.
Fixed a couple errors in the tests.
Adding some logging for crazy save validation bugs. Swapping in flag item slot.
Merge branch 'master' into production