Use epsilon value to compare duplicate polyline positions.
Add tests.
Update CHANGES.md.
Adjust epsilon value when comparing polyline vertices forduplicates.
Add relative tolerance tests to Math and Cartesian*.
Use relative tolerance test to remove duplicate positions from polylines.
Update PolylineGeometry and PolylinePipeline tests.
Add tests for equalsEpsilonRelative functions of Math and Cartesian*.
Updates from review.
Merge remote-tracking branch 'origin/master' into polylineGaps
Update CHANGES.md
Merge branch 'master' into polylineGaps

Conflicts:
	CHANGES.md
Merge branch 'master' into polylineGaps

Conflicts:
	CHANGES.md
Changes based on offline discussion with @shunter.
Fix tests.
Remove deprecated GeometryPipeline.combine and GeometryPipeline.wrapLongitude.
Merge branch 'master' into polylineGaps
Updates from review.
Fix bug in RectangleGeometry where array was indexed past its length.
fix typo