Adds a user model
Adds welcome routes to routes.rb
Modifies users table
Adds validations to user class
Adds paperclip to the user class
Creates avatar folder and adds missing.jpg
Adds paperclip gem
Adds migration file to add attachment avatar to users
Adds welcome view
Adds nav tag that renders user nav partials
Adds shared partial for non user nav
Adds shared partial for user nav
Adds form for creating a user as a partial under user
Adds users edit view that renders the user edit form
Adds new user view that renders the create a user form
Adds user login view that renders a login form