Merge pull request #74 from eparsons/templates

Beginning of clearing accounted for status
Added new list to available items, added ability to check in
Fixed bug in showing the wrong button in item details
Template should be there
Removed the unnecessary second page to make an item available
Merge pull request #76 from billliu1992/master

Added another list to available items, added ability to check in
Altering navigation so that add items and checkouts can be from any page.
Merge branch 'master' of github.com:acm-uiuc/tatt into templates