Merge pull request #13 from brandonkwong/categoriesmodel

added testing for models
Added Tag and Tagging models, setup AngularJS, and updated items controller
Merge pull request #14 from brandonkwong/taggings

Added Tag and Tagging models, setup AngularJS, and updated items control...
testing in users and tag controllers
Merge pull request #15 from brandonkwong/controllertesting

testing in users and tag controllers
Setup item display in user index and added item creation form
Merge pull request #16 from brandonkwong/taggings

Setup item display in user index and added item creation form
User edit and destroy
Merge pull request #17 from brandonkwong/users_edit_destroy

User edit and destroy
started categories model
added index to categories model
added index to categories model
added to categories controller