Addressed case where GFI may not have bearing

Initial GFI point will not have bearing NULL. Return stopid found by
neighbourFinder.
Keep record of previous bearing

If distance between points is too short use previous bearing
Ignore ArcGIS locks
Fixing calculation of bearing
Using bearing from GPS - starting

Calculcate a running bearing from raw GPS points, not GFI.
Starting.
Fixed bearing calculation.

Need to measure FROM old point TO new point.  Arrgh.
Export GPS points to shape.