`rails g devise:install`, plus following the instructions.
`rails g devise user`
`rails g migration add_username_to_users username:string`
`rails g devise:views`, committing only the relevant files.
Next steps on gems, with simple_form
`rails g simple_form:install`
User shoulda to test validations
Complete basic user signup
Complete testing sign up.
update README with PR assignments.
upstream merge
Merge remote-tracking branch 'upstream/master'
add username login