GeoPointList: Common, non-generic list (Items based on IGeoPoint)
GeoPoint I/O: Refactoring part 1
GeoPoint I/O: Refactoring part 2
Added GeoPoint conversions to IGeoPoint
IGeoPoint: Changed SourceFileIndex to SourcePath (now take use of it)
Added IPktFile.Store
Replaced IIf() by If()
GeoPointList: Moved unique ID checking from VerifyConstraints() to IDCollection.InsertItem()
Moved "Constraints" from GeoPointList to GeoPoint