Anti-harassment / incident handling

We don't have anything explicit about harassment in the CoC yet, and sadly I suspect it's necessary to make our stance on it clear. We also haven't yet said what'll happen if you violate our standards.

In particular, while we've got stuff down about "behave respectfully" and "contribute positively and constructively", we don't really cover exclusionary jokes, invasions of personal space, or—to quote [confcodeofconduct.com](http://confcodeofconduct.com)—"deliberate intimidation, stalking, following, harassing photography or recording, sustained disruption of talks or other events, inappropriate physical contact, and unwelcome sexual attention".

I'm not necessarily proposing a necessarily-incomplete laundry list of don'ts, but I do think we need to shift along the vagueness-verbosity spectrum a tad.