Add User model
Add User controller
Add User new view
Add user validations and make unique email in database
Add gem 'bcrypt-ruby' to Gemfile
Add database unique rule for email
Add has_secure password
Add password digest to users table
Add password validates to user model
Merge branch 'dev_users_model' into dev_users
Merge branch 'dev_user_controller' into dev_users
Add user show page, _footer development information, change application.html.erb
Add gravatar pic
Add profile page
Add error message for form
Finish user signup
Merge branch 'dev_sign-up' into dev_users
Add sessions controller
Add user token
Add sessions resources