initial commit, includes og-metadata parsing

Currently parsing accepts two common pattern. check page source
for
1. http://github.com
2. http://www.imdb.com/title/tt0075148/?ref_=nv_sr_2

TODO
add logic to parse out other essential objects(title,description,
images,videos,etc.) from html document.
Merge branch 'master' of github.com:maheshgondi/url-over