Compile Time Changes

Added methods to ElevArrow to make it a bit easier to get started with.

cm/abstract/tools/elevations/elevArrow.cm

cm/abstract/tools/elevations/elevArrow.cm
// Class: ElevArrow
Added: extend public Primitive3D toArrow(Primitive3D prim);
Added: extend public point toArrow(point p);
Added: extend public point2D toArrow(point2D p);