plugin: more supybot-esque help for commands

plugin: we don't use roundup anymore, bugs are handled by bugzilla plugin

plugin: generate changelog-using commands easier Also, "using capital letters is a good way of assuring that you don’t accidentally expose helper functions to users as commands". Oh yes, and so self-explanatory too!

plugin: use a 2-tuple as an argument to string.startswith()

plugin: use subprocess.Popen instead of os.popen, handle stderr

plugin: rename changeLog

plugin: use limnoria plugin template

pipelines: name steps

pipelines: limnoria on python3

pipelines: supybot on python2