Refactor CategoriesController#query and CategoriesController#create
Refactor main Backbone app to properly destroy views and controllers of currentApp upon app switch
Add appId, fix scope of #root, and use App.setCurrentApp in FoldersApp
Add categories route to client-side app
Add categories collections, models, and views
edit .gitignore and fix user test fixture
Move Cthulhu variable declaration into test scope
Add missing Travis CI env vars
Merge pull request #291 from theponti/add-category-app

Add category app