strand texcoords as orco coords, so yafray doesn't have to be adapted for this. bugfix #4254 added support for dupligroups, but might not work completely correct yet at this point, more testing needed. Also added some missing parts from the code apparently removed at some time. Mainly having to do with dupliverts, cam.info for aspect ratio/ortho mode/etc. Header stats (render window) should now work again too. Fixed missing last tile draw of render window. Added the missing const_cast in the win32 part of the xml export code.