Add Admin functionality

 - Add authentication methods to application controller
 - Add Admin boolean to users table
Add Dashboard and Index view functionality

 - Add ActiveRecord queries to Dashboard controller
 - Add sortable method to application_helper.rb
 - Add jQuery to Dashboard view
 - Add table to index view to display user information
Clean up dashboard view

 - Add ability to sort through all of the users
 - Clean up dsiplay of information on main dashboard page
Clean up Dashboard controller and view

 - Remove weekly_stats method from Dashboard controller
 - Remove weekly_stats view
 - Remove weekly_stats route from routes.rb
Remove Dashboard partials and Views
Merge branch 'master' of github.com:MrBeardface/Tips_on_Rails