Add a spatial orientation/navigation demo

[truedat101]

There is a nice code snippet from Allessio:

[truedat101]

There are good samples now in the main samples project using orientation stuff.

[truedat101]

How good is the dead reckoning and localization? Can I get true north easily or does this come from the phone?

[truedat101]

Would be cool to make a compass orientation lens.