Npm dependencies in alphabetical order

Every `npm install some-package --save-dev` call orders the dependency list alphabetically. Thus, it makes sense to order the deps in the blueprint to ease ember cli app upgrades through `ember init`.
Merge pull request #1413 from manuelmitasch/patch-1

App blueprint: Npm dependencies in alphabetical order
added test section to environment.js blueprint
Merge pull request #1417 from marcoow/test-env-blueprint

Ddded test section to environment.js blueprint