actually use the correct db name
create user table
create user controller
setup signup_route
initial validations and tests for user models
add index to users
downcase email to ensure uniqueness
add password_digest to users
tests for user authentication
initial user model with authentication
refactor before_save downcase
Merge branch 'feature/users' into develop

* feature/users:
  refactor before_save downcase
  initial user model with authentication
  tests for user authentication
  add password_digest to users
  downcase email to ensure uniqueness
  add index to users
  initial validations and tests for user models
  setup signup_route
  create user controller