adding test for validating name
adding length and form validation to the spec/models/user_spec.rb
adding validating the uniqueness of email addresses to user_spec.rb
generating migration index, adding index/unique to migration, and ran db:migrate
adding before_save to user.rb to ensure email uniqueness by downcasing the email attribute
adding 'bcrypt-ruby' gem to Gemfile
adding password_digest column to user_spec.rb, generated migration, migrating development database
adding tests for the password and password_confirmation attributes
adding test for the authenticate method in user_spec.rb
adding to user.rb implementation for secure passwords
adding first user using rails console
Merge branch 'mh_chapter_6'