Fixed small logic error in smoothEdges that meant that point groups at the...

Fixed small logic error in smoothEdges that meant that point groups at the start and end of the edge weren't handled properly.  Changed from compiling with FULLDEBUG.  Using the exact kernel because dualisation was causing CGAL to fail an assertion.  Going to examine the failing tets and try to check and intervene if possible so the inexact kernel can be used again.