TODO: EventListenerList - list of events - datatype
DCC file transfer updates (events)

Add 2 events for dcc file transfer
Add sets in dcc manager + methods for selecting transfers
Add methods (description, infos)

TODO: status event for transfers?
TODO: add ctcp/dcc commands
prepare dcc file transfer for streams? + FIX

TODO: allow streams as output medium,
can be file, zip, etc.

add "f" in long description of file transfer