Sorry for not disclosing my real name to the wide audience. I'm just
that paranoid...

we can now send pep thing to a zeroconf connection objec, it will just send nothing. so GUI doesn't have to know it's a zeroconf connection or not. fixes #5432

Most important change is that pep send/retract functions no reside on the ConnectionPEP object.

The pep dict contacts the different UserPEP classes.

There is still room for improvement, but it should be better.

Proof of concept: Move markup / pixbuf determination logic from the UI to the different PEP classes.

Currently this is only done for UserMood. We can decide later on (if needed), to move the asPixbufIcon and asMarkupText methods to a more appropriate place.

Goal is to remove as much redundant code as possible.

(Currently it is done at the UI level in many, many different places)

Initial simplification of PEP data extraction by moving the extraction methods to the newly created PEP classess.

If-else-retract complexity is substituted by dictionaries.

Create a class for each PEP XEP that we support. Dispatch an event to the Interface() handlers when we have have received a PEP event.