Made a start with display of sociable on the frontpage
Get social networks from database.
Removed unused code
New class Yoast_Sociable for functionality that is used by frontend and backend.
Removed get_social_networks function as it is now in Yoast_Sociable class
admin and frontend both extend Yoast_Sociable. Require the Yoast_Sociable class in sociable.php
Merge pull request #4 from Yoast/add-social-networks-to-post

Add social networks to post