Shows current location at default zoom level on launch.

* Sets default zoom level and finds user location when location services connects.
* Moves initLocationClient() after initMapController() to prevent possible race condition.
* Simplifies TestMap by removing setMapPosition(...) and getMapPosition(). Tests still pass yay!
Merge pull request #68 from mapzen/find-location-on-launch

Shows current location at default zoom level on launch.