Merge pull request #415 from codecombat/master

Merge master into production
Update zh-HANS.coffee
Merge pull request #421 from codecombat/master

Merge master into production
Tweaked the coordinate display position to be a bit more above the mouse.
Fixed a bug where sometimes new worlds would hide the hud speaker unnecessarily.
Merge branch 'master' of https://github.com/codecombat/codecombat
Redirect to play page for non-existent levels. Fixes issue #396
Merge pull request #423 from codecombat/master

Merged master into production
Tweaked sprite scripts to use given response buttons even if the script is not skippable.
Modified locale messages for "level_load_error"
Used internationalised strings for level not found message
Moved internationalisation of level load error message into template file
Merge pull request #422 from yangshun/level-not-found

Redirect to play page for non-existent levels. Fixes issue #396
Trying to get session code merging to work again.
Added a screen for when playback ends.
Merge branch 'master' of https://github.com/codecombat/codecombat
Update ru.coffee
Fixed simulator

The format of something must have suddenly changed?
Blur the music button after click so that subsequent space and enter keydown events do not trigger it. Fixes issue #306.
Update ru.coffee