Added classes
Merge branch 'master' of https://github.com/dmikeasem/giffer

* 'master' of https://github.com/dmikeasem/giffer:
  garbage 3
  final styling on posts
  Added usernames to sign_in and user/edit, validating presence and uniqueness

Conflicts:
	app/assets/stylesheets/bootstrap_and_customization.css.scss