Level preview now loads from backups so that brunch reloads don't cause the preview to break.
Refactored server.coffee
Merge branch 'master' of https://github.com/codecombat/codecombat
Component part of #266.
Systems part of #266.
Fixed cloning.
Merge pull request #289 from codecombat/refactor/server.coffee

Refactored server.coffee
Fixed the bug where opening a modal or switching a tab while having a thang to add selected would create a thang.
Made the level editor layout more stretchy.
Merge branch 'master' of https://github.com/codecombat/codecombat
Initial work at czech translation
Correcting typo

Correcting typo causing The Travis CI build could not complete due to an error
Misunderstood the first translation line. Fixed.
Merge pull request #291 from vanous/cz-translation

Initial work at czech translation
Updates for Aether's protectAPI stuff.
Merge branch 'master' of https://github.com/codecombat/codecombat