Blender 2.91 - Default shader gamma issues

[McManning]

I'm noticing gamma differences for the default shader. But I remember Blender changing how this works so I'm going to have to go re-read changes for 2.91 (below would be 2.82 vs 2.91)

Originally posted by @McManning in #15 (comment)

[McManning]

I've added bl_use_postprocess to the micro.py copy - which lets someone use the Color Management section of the scene settings to handle how things should be transformed. I think this'll be the right approach moving forward - if people want gamma correction in the shader themselves rather than blender settings - they can DIY it. No need to add it to the built in fallbacks.