OGP: Twitter Card Integration

[WillStrohl]

https://dev.twitter.com/docs/cardsExample

Twitter Card Tags: < meta name="twitter:card" value="player" >< meta name="twitter:site" value="@youtube" > < meta name="twitter:player" value="https://www.youtube.com/embed/_EYi7k1rM9Y" > < meta property="twitter:player:width" content="1280" >< meta property="twitter:player:height" content="720" >

ORIGINAL: https://dnnopengraph.codeplex.com/workitem/12556