reset zoom level and points north on find me

- Resets zoom to default and sets map orientation north up when the locate me button is clicked. 
While technically permitted by the compiler, its better practice to access static members via class rather than instance.

Since we are already touching this code it would also be great to separate "ZOOM" and "LEVEL" with an underscore :)

    isEqualTo(MapController.DEFAULT_ZOOM_LEVEL);