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

- Receive URL encoded JSON messages from RavenJS
- Pass out through Raven client
- Updated test
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
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)
fix theme promo on disco pane
Merge pull request #1713 from JaredKerim-Mozilla/942912

Update Error Reporter to receive messages from RavenJS (bug 942912)
Switch dev to Bango Test for Simone (bug 970310)
Fixed problem with weekly installs calculation (bug 962174)