Add e-mail validation to contact model
Create model for user roles and add password to contact model
Configure seeds.rb to populate database on setup
Add user roles to seed file for database population
Fix wrong name used in migration for contacts_roles
Create sessions controller/view
Add user to seed file
Add route and link to destroy a session (logout)
Merge branch 'user'

Conflicts:
	db/seeds.rb
Remove style for login from layouts CSS (was moved to sessions CSS)