Votes now have pointer to current user
Merge branch 'master' into add_users

Conflicts:
	app/src/main/java/com/example/chowdown/activities/MainActivity.java
Merge pull request #37 from knnyluk/add_users

Add users
skips restaurant ranking screen if current user has already voted
LunchEvent detail view looks different depending on if current user has voted
Merge pull request #38 from knnyluk/lunchevent_detail_votestatus

Lunchevent detail changes based on whether or not the current user has voted