Remove NIL and Hermes as key influences

Rust no longer supports typestate, which it seems was the main reason these were mentioned.
Remove Erlang as a key influence

Rust no longer supports linked task failure nor light-weight processes, so the influence is now limited.
Move NIL, Hermes, Sather, and Napier influences
Move Newsqueak, Alef, and Limbo
fix nil hermes
Simplify influences appendix introduction