Initial Commit.

Plugin to display a simple Favorite icon that lets the user click
Favorite on a post. This number is displayed to all users.

css is just a heart, so dropping in a different image wouldn't be hard.

javascript depends on the .post-fav class is all.
Added Readme and Snapshot

Added readme with some information and a snapchat of an example site
using the plugin. Need to check if markdown syntax for the image is
correct or not.