Move similar methods together.
Remove some reference to flat profile.
Remove reference to EPS.getMaxSlope()
Remove reference to getElevationProfileSegment()
Remove references to EPS.getSlopeXxx()
Remove reference to getElevationProfileSegment()
Remove override of removed function.
Merge ElevationProfileSegment to StreetWithElevationEdge.
Split elevation profile by caller.
Remove partial getElevationProfile from StreetEdge.
Merge pull request #1550 from laurentg/pse-optimizations

Merge ElevationProfileSegment into StreetWithElevationEdge.