Sunflow exporter updated...

I just updated the SunFlow exporter, mostly usability improvements, and a couple of little bug-fixes... 

What's new in v0.17: 
- updated the script to work with SunFlow v0.07.2 
- fixed a bug in particle export 
- adds camera settings for lens sides and rotation 
- shaders now use the material name if a material has been assigned 
- changed the file extension of particle files form *.bin to * 
- added an option to export geometry to a separate file with the extension * 
- the exporter no longer needs the plugin 'Endian.dlx'