[semantism] Fix querystring cleanup
source: Update Source models to not duplicate links informations

The datamodel has changed:

    Links are stored into the Url models, where all it's informations
are stored:

    - link : the complète and cleaned url
    - title : the url of the title
    - views : the total views count
    - tags : A many to many to all the links tags
    - raw_tags : A raw string of tags
    - content : The full page content
    - image : An image illustrating the link
    - inserted_at : The datetime of it's insertion
semantism: Conform to source models update
userprofile: First class
collectors: Use user token for view collectr
webapi: First classes using tastypie
webapi: Add authentication & authorization
Add tastypie dependancy
indexer: Rewrote entire indexer, using Goose. With tests
webfront: Update model's move
semantism: Fix method handling from content-type
webfront: Correct use of new model's move
semantism: extract sentences correctly
collector: Update irssi script
semantism: Fix url fetch
semantism: Increase summary up to 500 chrs
semantism.link: code cleanup
semantism: cleanup link
webfront: Fix search view
webfront: links_today test