Add (exposed) #/admin/checkins page

This also moves checkinService over to just Checkins and uses .
This also makes CheckinsController actually use the jbuilder templates.
And it camel cases all of the json coming out of rails because no one likes
having to deal with snake case in javascript.
Oops. Don't commit that.
Merge branch 'master' into checkins-index

Conflicts:
	angular/app/index.html
Merge pull request #2 from CoolCulture/checkins-index

Add (exposed) #/admin/checkins page
Merge branch 'master' into add-user-login