Added welcome controller
Configured Heroku
Configured Sendgrid
Configured Figaro
Created initial user (admin) integration test
Creatred initial user (admin) factory
Set up Devise and created User model with name and role attributes
Update 'sent-from' email
Add 'Home' and 'New User' links on application layout
Added bootstrap, links to Home and Users on Home page.
Sign-in / Sign-up links
Style Sign-in and Sign-up forms
Refactoring views, add name as permitted parametter to application_controller
Updated presentation of flash messages
Finish authentication setup; fix SendGrid not firing (bad username / password) error
Merge auth-updates into master