a vote button appears only if current user
Merge branch 'master' of https://github.com/tiger-swallowtails-2013/Fashion_Forward into vote_button

Conflicts:
	app/views/answers/index.html.erb
add vote_button that doesn't show up if user has already voted or if user posted answer or not user logged in
Merge pull request #14 from tiger-swallowtails-2013/vote_button

Vote button