docs
various cleanups and comments; todo on LRUCache and working minimal regression test; and otehr regression test cleanups
renamed Math::OverlapOrStrictlyContains to Math::Overlap ... and got regression tests working: may still want to refine/fix definition for how this works (edges); and better document
cleaned up, documente,d and fixed Math::Overlap
more cosmetic clenaup of Math::Overlap
hopefully fixed bugs with recent scripting changes to DoCheck/DoRun tests scripts
cleanup and math test cases