Additional options for 2D GRUMMP executables

There are two command line options that apply only to the 2D GRUMMP executables.

• [-c arg] If the argument is non-zero, protect boundary edges from nearby insertion using diametral lenses instead of diametral circles. Diametral lenses are smaller than diametral circles, and result (both in theory and in practice) in better meshes. Robust values are 0 and 1. An experimental extension that gives somewhat better meshes in practice but is less robust is available with the value 2. Default: 1.
• [-j arg] If the argument is non-zero, coarsen anisotropic meshes with the goal of reducing cell aspect ratio. Default: 0.