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