Added SPHARM R support code

Source file to batch convert ASCII ply files to ASCII stl files
And to write coordinate data to SPHARM's .landmarkAscii file
SPHARM (http://www.enallagma.com/SPHARM.php) is a software application
to
perform 3-dimensional spherical harmonic analyses of triangular mesh
surfaces.
(Shen et al. 2009 Evolution)