Flip latitude and longitude in RectangularLocation.

I made the terrible mistake of getting these mixed up. Always make sure you know what
terms are before you use them. :-)
Add function to compute closest heading offset to a RectangularLocation.

Will be used by new BuildingLocationManager algorithm.
Remove start and stop rendering functions from OutsideView.

These are not needed because it won't be displaying a camera/viewfinder anymore.
Implement logic between TourRenderer, OutsideView, and InsideView.
Report on location availability and send to OutsideView.
Fix bug where InsideView wasn't rendering.

This took like 4 hours to figure out, and I still don't know why it
works. #programmerproblems
Display status message on OutsideView with location/compass errors.
Use sp instead of deprecated sp.
Add original photos.