initial commit
users and session controllers
markdown and attempts controller
added gems
new columns for oauth in user model
github authentication
added gems
Merge branch 'master' into github_auth

Conflicts:
	app/controllers/users_controller.rb
Github auth
user controller change
merge conflist in user_controller
updated to postgresql, github oauth and gist created
ajaxed start challenge functionality
double login v1
conflicts fixed
tagline
added twitter bootstrap, created index login page
fixed background image bug
dual attempt updated, not tested
updated attempts controller for dual login