Restyled index page with grid layout
Styled prompt show page
Included font awesome
Fixed merge conflicts for vote addition
Added vote buttons to prompt views
Merge pull request #37 from apesic/styling

Styled index and prompt view, added vote buttons
Require user to be logged in to prompt or respond.

- Changed tests to reflect login requirement
- Changed vote feature tests to reflect new page styling
Merge pull request #38 from apesic/controller-specs

Require user to be logged in to prompt or respond.