Adding e2e and unit tests

- gulp file updated to correct "test:e2e:ng" task, improve "lint" task, and include other necessary files for unit testing
- package updated to include additional dependencies for testing
- added controller-spec.js to unit test the "StorageCtrl"
- e2e test added
Merge pull request #11 from Rise-Vision/chore/e2e-tests

Adding e2e and unit tests