Hide Firefox OS and point Apps to /marketplace

Hidding Firefox OS until launch and changing the slug for
Download and Install apps so it shows articles related to
the Marketplace topic.
[bug 880242] Switch from Tweepy to Twython
Remove tweepy from vendor.
Update db strings with new product topics.
[bug 884818] Remove code for old topics along with new-topics flag.
Update anonymize script to blank out new topic images.
Removed no longer supported url.
Added API for oSUMO. Still very early.

Code needs to be seriously refactored and tested before we can do
anything.

Made the URLs actually work

Changed the product serialization a littl

Actually made cors_enabled compliant
Changed the offline API a little

Save some space and makes more sense..

Restructured the data dump

Some changes to accomodate the offline stuff.

Started on WikiParser, though that still need a lot of work..
Updated for upstream
Added redirects
Filtered out unuseful categories.
Fixed a problem with 500 on non-existant products
Fixed a bug
Added the topic name localization
Fixed product filtering, archived articles.
Added search indexing.

Needs massive cleanup and whatnot.
Updated index, got rid of Counter
Restructured project
Added search and added offline into installed apps