these are things that are not included in the core commons version
because they're homebrew, because they are a lot of writing/creativity
that I don't feel comfortable stealing/distributing, or so on. most of
Old Gus's and the community's content is removed in order to have a
near-CSRD state
what remains is the rules clarifications, errata, splicing together some
information from secondary sources (like the Starter Set or from game
authors on Twitter), and organizational assists
things removed includes ideas that I like, but either plan to write my
own way in the future, or again I just don't feel comfortable copying
verbatim, especially if, for instance, I have my own process and don't
need to advocate for a different one
stuff that's likely to get folded into my core is arbitrarily numbered
300s instead of 000s
