Spectral Bloom/Blur + tutorial + .tox

Another part of the tool dump.

I was looking up some different approaches to bloom and blur and stumbled upon this amazing video https://www.youtube.com/watch?v=ml-5OGZC7vE by SimonDev.

And decided to try to implement it in TD. And wrote a little tutorial about it - becuase it was such a fun approach. available in .md for the nerds and a .pdf for the rest.

And I've also attached a component to experiment with Frequency-Domain Convolution. and create both Blur and Bloom effects.

I will add that this is still an experiment and I'm not certain the benefits of spectral blur outweighs the drawbacks. It's not necessarily a better way to do blur and bloom - but another way.

Important to note.
The spectrum TOP is acting a little strangely an unpredictably - this is a TD bug. I've made a comment about it in the example file. and also reported it to the wizards at derivative.