- move POINT_DATA_* to texture_pointdensity.c. - remove MTEX_NSPACE_*. - replace magic numbers with defines for Tex::vn_coltype comparisons. - use doxy sections.
- move POINT_DATA_* to texture_pointdensity.c. - remove MTEX_NSPACE_*. - replace magic numbers with defines for Tex::vn_coltype comparisons. - use doxy sections.