Introducing aomenc-psy101

Another aom psy fork, by me, utilizing patches from the unmaintained psy fork and its popular lavish fork, as well as original changes. It's overall closer to mainline, as I have decided against applying a lot of patches that I found to be more harmful than beneficial for efficiency when applied to current mainline aomenc. If you're missing parameters from aomenc-lavish, please request them with a short explanation, I might add them, currently I have only applied those that I am interested in using myself. Other suggestions are welcome as well.

I plan to frequently merge mainline changes into this fork.

Defaults are much improved, something like a simple --end-usage=q --threads=16 --tune-content=psy --cpu-used=4 --cq-level=20 should provide very good results.