Added ability to see users profile on front-end.

Added profile to prevent collisions with user namespace, and added
ability to link to a users profile and see a users information.
This checkin includes a number of things listed:

- Addition of twitter bootstrap icon sprites.
- Removal of bootstrap.css, to instead use propper asset pipeline gem
  and path conventions.
- Modifications of styles.
- Modification to users controller (minor).
- Added abilities and roles models, non-active-record, for future use.
- Updated users index path to include a link the users profile path.
- Updated header.
- Updated devise messages to remove all shout-outs to an email, and
  instead give shout-outs to the admins need to do the actions required.
- System wide routing updates.