Adds User controller, route and view for User#show, and links @ mentions to the particular user's show page
Deletes the user controller and all associated files and creates User profile page through existing Tweets#index page. Also changes routing to include usernames.
Attempts to create mention links within the Twet content
Adds Avatar gem
Adds Application helper method to call user's gravatar, and also attemps to add Gravatar to views
Fixes @mention linking through use of helper vs. trying to embed helper method in the controller
Changes index html
adds gravatar to left nav and twet index page