add association spec for console/game/genre
update association for discussables
update seed file with discussables
add links to games genres and consoles
udpate articles_controller
update article index view
update show for games views
update views for consoles
update seed file
update views for genres
update seed
fix bug
Merge pull request #35 from ospreys-2014/add_polymorphic_association_for_articles_xiran

Add polymorphic association for articles xiran