Goal of this iteration: Refactor tests and show repositories of a user instead of watched repositories
I refactored the GitHubAdapter tests and added more tests for store-adapter integration. Currently the watched repositories of a user are shown. I changed to this so now the repositories of a user are displayed. The watched repositories will come in handy in a future version when also the followed users are shown.
This iteration mostly includes refactoring of the tests for the adapter. I also updated the Ember.js to the latest build of master (last commit 6851158).