plugin: add more repos

plugin: snarf differential revisions and URLs

plugin: add a basic differential parser

plugin: describe the plugin

This is where your commit messages goes. For example: remove needless comment

plugin: move repo paths to config, finally add tests for changelog command

plugin: strip individual lines in changelog, and not skip empty lines Empty lines are still possible if (e.g. user is empty for null rev).

plugin: drop {files} from changelog template, they weren't used anyway

plugin: more supybot-esque help for commands

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