Minor changes to radiosity_export, updated to work with the new API (vertexColors MTFace)
obdatacopier - was getting the selection but not using it. made it ignore some read only properties.
BPyMesh - minor change: use face iterator rather then making a tuple()
import_obj - comments, docstring additions, cleanup.
OBJ export: -renamed export_obj
faster edge exporting (use edges LOOSE flag rather then finding zero face user edges)
check for file before overwriting
use object iterators