DAVID Laserscanner Wavefront *.obj file reader, plotter, volume and surface area calculator

1. Now can read obtain vertices coordinate, normal vectors, and the corresponding faces from texturized data (without parsing the texture itself).
2. dispObj now uses particle's surface distance from the centroid for the patch coloring scheme.

Update in v1.1:
1. NaN padding in unfilled part of face descriptor data, so the results of readwObj can directly be plotted using MATLAB's "patch" function.
2. Now can read *.obj file without vertex normal data.