Max to Sunflow Exporter v0.22 released

I've released a new version of the SunFlow Exporter. This one adds a number of small features and bugfixes:

- adds the "Enable Jitter" option to the Sampling settings
- adds support for spherical cameras (the old exporter only had support for the fisheye camera)
- adds an option for importance sampling to the IBL settings
- adds a setting for SunSky turbidity
- adds an option to reverse the bucket order
- changed the layout of the Camera section to avoid confusion with the different settings for different camera types
- planes are now only infinite if the render scale is greater than 1
- changes the way of getting blur strength for Phong shaders again (now uses Max softness setting x 1000)
- fixes a bug with filenames for separate geometry files
- fixes a bug with GI settings in the INI file not being loaded properly
- fixes a bug where the exporter would crash if the camera was deleted before exporting the scene
- fixes a bug that was causing problems in Max if the script aborted during export

The next thing I'm going to tackle is multi/subobject materials. I'm going to have to rewrite the whole material export side of things to get it working properly...