Added Blu-ray.com backlog automation

I missed a few movies, so I added backlog functionality to Blu-ray.com

If you want to add all Blu-rays that ever came out to the wanted list,
you can use this. Be careful with what you wish for :D
set backlog to False after backlog search
Merge branch 'develop_bluray' of git://github.com/mano3m/CouchPotatoServer into mano3m-develop_bluray
Make description more clear
Code formating
Merge branch 'refs/heads/mano3m-develop_bluray' into develop