v0.2.3 Hotfix: Disabled dithering in color banding test

So, I realized some things weren't displaying as expected with SDR displays, and looked into it. 

Turns out it was something I mentioned before but forgot was active in the demo! Dithering! In unity per camera you have a dithering toggle which will try to smooth out images to avoid color banding. It's solidly effective provided the information it's working from is internally HDR. As such it doesn't do anything about SDR textures or banding produced by the game itself. While it won't give you more detail it won't produce ugly lines across smooth gradients for things like lighting or bloom in most cases.

For the purposes of the demo this feature has been turned off, and a note added about it for developers.  I may add a toggle so people can see how the solution fares on their displays. As there is some subtle benefit for HDR displays aswell!