adding (sign in/sign up) page for login

using 'twitter_bootstrap_form_for' for sign in/sign up

Conflicts:
	Gemfile
	Gemfile.lock
	app/assets/stylesheets/application.css
	app/views/layouts/application.html.haml
	app/views/projects/show.html.haml
	config/routes.rb
Users must confirm their email
Confirmation handled properly when users are notified
New project redirects to the right login page
Better sign in form
Better project index
Can create multiple projects on the same GitHub project
Better views
Better distribution form
Better loading of suggestions
Suggestions in columns
Fixed feature
Recipient links to user page
Better user form