rfr_ Adding pagination

Added pagination + specs for the user page available to the admin and to the bus page available to the user.
`will_paginate` and `kaminari` are alternatives -- I wouldn't use both, so I'd get rid of this line (also the gem is `will_paginate` with an underscore).  I'd make sure to get the pagination with kaminari merged in, then work on infinite scroll in a separate branch.  Just make sure to check in with the rest of your group to make sure that everyone's on board with the plan.

If you do want to do infinite scroll, kaminari has a tutorial on how to do it:
https://github.com/amatsuda/kaminari/wiki/How-To:-Create-Infinite-Scrolling-with-jQuery