removed application controller and view for homepage and replaced with welcome controller and index view
adds basic user controller and methods
deletes unnecessary helpers, moves new logic to create method in user controller
adds users_helper to grab gravatar image
deletes unneccessary helper methods generated from previous rails model or scaffold generations
adds private user_params method to users controller to make sure all the parameters are required
adds error_messages partial to new form to display error descriptions if user can't be created
deletes html from application html file so we can put user-logged-in logic inside a header partial
adds flash functionality when a user is created to the application page, so everytime a user is created a flash texts appears
adds footer partial for layout
adds header partial for layout
adds session controller
adds logic to sessions controller
deletes unneccessary info from application controller
some session controller logic
deleted helper and added some view items
Merge pull request #1 from opleban/melissa

added many things
adds user_controller logic
merge conflicts
Merge pull request #3 from opleban/plauer_implement_login

Plauer implement login