Update Error Reporter to receive messages from RavenJS (bug 942912)

- Receive URL encoded JSON messages from RavenJS
- Pass out through Raven client
- Updated test
Commit from Mozilla Verbatim by user steekid.: 4985 of 4985 strings translated (0 fuzzy).
Merge branch 'master' of ssh://github.com/mozilla/zamboni
Update Russian L10n
Commit from Mozilla Verbatim by user auzelac91.: 1819 of 4985 strings translated (0 fuzzy).
Merge branch 'master' of ssh://github.com/mozilla/zamboni
Cleanups in preparation for Django 1.6
Bug 970938 - Update sr-Latn with sr-Cyrl converted running icu4c script
update docs from marketplace-docs repository
Update identifiers for ValentinesDay (bug 970500)
Merge pull request #1753 from clouserw/updatedocs

update docs from marketplace-docs repository
Merge branch 'master' of ssh://github.com/mozilla/zamboni
fix themes in promo
fix exclude unrated games + usk rating refused apps (bug 958319)
Merge pull request #1754 from ngokevin/master

fix themes in promo
Merge pull request #1747 from ngokevin/iarcusk3

fix exclude unrated games + usk rating refused apps (bug 958319)
remove content ratings in admin settings form (bug 969545)
remove old AER games logic due to IARC (bug 968494)
fix theme promo on disco pane
Merge pull request #1713 from JaredKerim-Mozilla/942912

Update Error Reporter to receive messages from RavenJS (bug 942912)