3 small fixes

1. removed calcOrientationNorth, remove the '@Deprecated' from calcOrientation, and changed depending functions

2. reduced precision of GPX double values (lat,lon,distance) and also of distance in json response
to configurable values. Default is 6 digits on right side of comma/point

3. suggestion div should now be hiding when zoom buttons are clicked or markers are dragged.
marker dragging does not change focus, so the specific drag handler was changed
Additionally "cursor: pointer" is used for suggestion divs