Correct misnaming, case, spelling errors, strip out dying hardened clay

There were errors and misnamings through this file. I've gone through and corrected those to get something which will work. There seems to be a total lack of the hardened clay dying recipes, so have stripped out that factory. Looks like this was all a bit too chaotic to release, in future should get original author on board _before_ backporting their changes.

There are now no recipes referenced by the factories which don't exist in the recipes section.