added gem will-paginate
added paginate method to index action in pins controller
paginates 3 per page
added next page link at the bottom of the pins index
added will_paginate-bootstrap
now pagination link is styled
added protected configuration to application controller so that user can update a name, since no user controller is accessible with devise game
added user name presence as true in user model
validates user description as true in pins model
corrected misspelled description validation
added image validation presence as true
added username so show who is the creator of the image