[app-name]/
  ...
  |__app/
  |   |__components/
  |   |__layouts/
  |   |__states/ # application UI states
  |   |    |__[ui-state-1]/ # ui state 1
  |   |    |    |__app.js     # state module definition and dependencies
  |   |    |    |__config.js  # state specific config
  |   |    |    |__[view-name]-controller.js          # state controller
  |   |    |    |__[view-name]-controller_test.js     # state controller unit test
  |   |    |    |__[view-name].html                       # state view template
  |   |    |    |__[ui-state-1].scss                      # state specific CSS
  |   |    |    |__[image-name].{png|gif|jpg}             # state specific image(s)
  |   |    |    |__i18n/ # resource files with locale specific localization rules for this state
  |   |    |    |__[ui-state-1.1]/ # child ui state 1.1
  |   |    |         |__app.js   # child state module definition and dependencies
  |   |    |         |__config.js   # child state specific config
  |   |    |         |__[ui-state-1.1]-controller.js      # child state controller
  |   |    |         |__[ui-state-1.1]-controller_test.js # child state controller unit test
  |   |    |         |__[view-name].html                  # child state view template
  |   |    |         |__[ui-state-1.1].scss               # child state specific CSS
  |   |    |         |__[image-name].{png|gif|jpg}        # child state specific image(s)
  |   |    |         |__i18n/ # resource files with locale specific localization rules for this state
  |   |    |__[ui-state-2]/ # ui state 2
  |   |         |__...
  ...