Update Coordinate.swift - Moving Self and associated references out of Coordinate so it can be be use as more than just a generic constraint. - Added the requirements to _CoordinateConstructable.
Update Coordinate.swift
- Moving Self and associated references out of Coordinate so it can be be use as more than just a generic constraint.
- Added the requirements to _CoordinateConstructable.

tonystone/geofeatures2,tonystone/geofeatures2,tonystone/geofeatures2