Merge pull request #7 from drabinowitz/frontEnd

Hooked posts into firebase.
Add Votes factory with add and get methods.
Add upvoted object to room scope.
Add addVote function to room scope.
Update room factory with votes functionality.
Add votes property to post.
Update count for votes to reflect vote total.
Merge pull request #8 from Cheerazar/votes-factory

Add Votes factory and add votes property to posts.
added voting html features
Merge branch 'master' into frontEnd
added upvoting visualizations