Description:

Creates ApplicationFlow, ApplicationOperation, and ApplicationState with tests.

Example:

  `rails generate flow:install`

  Generates:
     Flow: app/flows/application_flow.rb
Operation: app/operations/application_operation.rb
    State: app/states/application_state.rb
     Test: spec/flows/application_flow_spec.rb
     Test: spec/operations/application_operation_spec.rb
     Test: spec/states/application_state_spec.rb