Add provider and uid to users
Add more columns to users
Add oauth to user model
Add omniauth callbacks controller
Add omniauth gem
Add routes and omniauth initializers
Fix up omniauth stuff for users
Add Sessions controller
Add users controller
Simple users show view
Add admin pages controller
Add admin dashboard paths
Add admin dashboard to navbar
Add base controller, fix the navbar
Create roles with names
Basic view for admin dashboard
Merge pull request #12 from rails-decal/mark/sign-in-with-github

Sign in with GitHub, admin dashboard, users