- We now pass subclassed components the stripped resource as a keyword, so they
don't have to bother doing it themselves.
- If a STANZA-ERROR is signaled during message processing, it gets sent back as
a response to the message. Yay less boilerplate!
- whatsxmpp contains a bunch of code that's useful for building XMPP
components in general. Why not factor this out into something more
- Eventually, we'll make whatsxmpp depend on this library...