Created login/logout functionality, Tweked HTML views too suport this
Made changes to views to support "login before posting" functionality
Create helper method for finding user and determining login status
Tweaked article controller to make sure login occurs before creation
Tweaked HTML
Made changes based off David and Lawson's feedback
Took Mike's feedback
More minor changes
Explicity declared existing user
Override factory girl
Resolve merge conflicts
Merge branch 'user_login'

Conflicts:
	app/controllers/articles_controller.rb
	app/models/article.rb
	app/views/layouts/application.html.erb
	spec/controllers/articles_controller_spec.rb