Intersection curve tool : plane/polyhedron
Drawing outline for polygons that don't have segments

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24418 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
added evalCommandCAS() to GgbAPI

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24419 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e