Improve controls for 3D mode

Hi,

3D mode work quiet good here except for one thing: whenever I try to "turn to look in another direction" I need to use 2 fingers and usually happen to rescale the display accidentally as well which is quite slow.

One nice solution for this would be if the orientation of the view could be tied to the compass of the device - turn south and the map view shows the south. The principle is nicely implemented as "compass mode" in my version of Google Street View

Thanks,