Nitbar update

[alibi_shop]

I've started putting up annotations for the works of John Sladek. Roderick is reasonably complete (not including some stuff that I just refuse to spend any more time figuring out— I didn't really realize till I got into it just how messy that book is, and how hard it is to find the context for some of Sladek's whimsies); I've just gotten started on Tik-Tok, which won't be nearly as dense.