Don't add endpoint when saving polyList (this creates duplicate points in cell which can be a problem)
Revert last change about duplicate points. The right place to do this is when saving the cvd file; added updated cvd file saving code that had previously been in another module
Changed GetCVLSWithLimitedPointsBetweenNodes to use interpolation by default, added unfinished MakeMatchedCVLSFrames and MakeMatchedXYListPolyListFrames, added comments
Added class SubContour to replace akward cVLS objects and function SubContourListfromCVLSList to convert existing cVLS lists
Switch functions from cVLS's to SubContour class; added functions GetValuesAroundSCPoint, GetSubContoursByFrame, & GetSubContoursAndOrderingByFrame; old functions are retained, but use the new ones as their base