Added a Bunch of providers.

Hi Cal!

I rewrote my previous pull request. I decided to split the valid and invalid providers into different branches.
So Here is a list with providers that closely follow the oembed spec

The list of providers added is:
  - Added nfb.ca
  - Added scribd.com
  - Added dotsub.com
  - Added Animoto.com
  - Added Rdio.com
  - Added Mixcloud.com
  - Added Screenr.com
  - Added FunnyOrDie.com
  - Added Polldaddy.com
  - Added Ted.com
  - Added Videojug.com
  - Added Sapo.pt
  - Added Justin.tv
  - Added Official.fm
  - Added Huffduffer.com
  - Added Shoudio.com
  - Added MobyPicture.com
  - Added 23hq.com
  - Added Urtak.com
  - Added Cacoo.com
  - Added Dipity.com
  - Added Roomshare.jp
  - Added DailyMotion.com
  - Added CrowdRanking.com