add mesh extras, gemstones, twisted torus, gears & 3d function surfaces
Now in folder add_mesh_extra_objects under 1 init file.

- Bug fix: hasSmokeSimulation lacked parenthesis

also option to export lamps was missing.

Added missed copyright entry in add-on info block -- svg-arc to
blender beziers calculation was made by JM Soler.

JM, sorry for this :)

Thanks to Yousan Noriyuki.

*Commented out non-manifold check on returned shards, it prevented open meshes to be fractured (e.g. Suzanne).
*Enhanced UI of Fracture Group op.

Added option for smoothing export - Face/Edge/Off.

Fixed the select smoothing face that was not working. Added console output for making sure it working or not on the button.

- Export: Selected Objects no longer exports children of the selected objects as well.

Updated the grease pencil layer conversion to work in Object mode instead of Edit mode, for GPENCIL_OT_SURFSK_add_surface and GPENCIL_OT_SURFSK_strokes_to_curves.

Indentation fix: if assigning a material already on the object to a selection of faces in edit mode the script would do nothing

  * On OSX, copy the Python lib folder to sit alongside the .app instead of the Unix executable.

Further Error handling to allow win 32 bits blender builds to render with Povray 64 bits and the other way around.

handle exceptions for reading non XML files - cant decode or parse, real errors in code will still raise exceptions.