[app-name]/  # app root directory
  |--_build/ # output build directory for gulp-processed files
  |__app/    # container for all user-generated app code
  |__bower_components/ # 3rd party vendor client libraries global to the entire app
  |__config/ # global project-wide config files not relevant to any existing folder, if any
  |__node_modules/ # 3rd party vendor node.js modules global to the entire app
  |__scripts/ # shell executable and config scripts
  |__specs/
  |   |__e2e/ # end-to-end specs
  |   |   |__helpers/ # e2e specific helpers
  |   |   |__page-objects/ # collection of page objects
  |   |   |    |__[page-object-name].js # page object
  |   |   |    |__...
  |   |   |__[spec-name-describing-feature].js # e2e test
  |   |   |__protractor.config.js # protractor config file
  |   |   |__...
  |   |
  |   |__unit/
  |       |__helpers/ # unit test specific helpers
  |       |    |__matchers.js # customer matchers
  |       |    |__state-test-helpers.js # helper functions for testing UI router states
  |       |__karma.config.js # karma config file
  |       |__karma.setup.js # karma global vars and requires 
  |       |__...
  |
  |__bower.json
  |__gulpfile.json
  |__package.json 
  |__README.md
  |__...