Updated the gemfile
Changed to books_checked_out
Added new routes
Removed the commented out route stuff
Revert "Added new routes"

This reverts commit 8b44fae9b0f11bcd84d030859c8f0d15abf244ac.
Added barcode to user
Added new checkout view
Updated views
Added hashed barcode
Checkouts work
Changed the redirect of new checkout and fixed the tests
Added the you checked out a book mailer
Added more tests
Added check_in to the checkouts controller
Check in's work
Updated the checkout show view sort of
Merge pull request #16 from rit-sse/checkouts-are-hip

Checkouts are hip