Once/If #341 is merged, it would be a good idea to update the code organization to adhere to latest best practices™ and bring the seed closer to the tutorial (see angular/angular-phonecat#326). E.g.:

• Rename components/ to core/ or common/.
  Now that "components" means something different, it can be confusing.
• Rename _test.js files to .spec.js.
• Rename module definitions files to .module.js.
• Update karma.conf.js to account for the above changes.
• Optionally, use components when appropriate.