monkeypatch pyramid_zcml.view

also remove manual fix from install docs
document command lines
no more empty response bodies

non-GET requests now have responses with a minimum of
{"ok": true, "status": 200}
If not ok, there's also an "error" key with a message.
Note that the status is a convenience that duplicates
the response status code.
note that docs need updating
update hal-browser with my latest tweaks

note that this includes my pull request:
https://github.com/mikekelly/hal-browser/pull/5