Add devise gem
Add devise and corresponding layout
Add welcome page & Prepare for Heroku
Add AngularJS
Add button board for collecting data
Add navigation bar
Merge branch 'devise_login'

Conflicts:
	Gemfile
	Gemfile.lock
	app/assets/javascripts/welcome.js.coffee
	app/assets/stylesheets/welcome.css.scss
	app/views/layouts/application.html.erb
	app/views/welcome/index.html.erb