Added firebase reosurce, returning service as Post.
Updated PostsCtrl to get Posts and save posts.
added new html
Added Firebase URL constant
installed angularfire throught bower and Updated post.js service file with FIREBASE_URL and  to get a realtime connection to firebase server.
Updated posts.js controller to use new Post service methods to update detele get posts.
Updated posts.html with lil new html.
bower install angularfire --save