asmack 0.8.9b4, b365d12e (2014-01-15)

Fix for error handler NPE when connection fails in initConnection().
XEP-0198: only dump packet content if debug enabled
version 0.8.7
XMPPService: fix NPE in setStatusFromConfig
make MainWindow (roster) a singleTask

This changes the Activity stack of Android to only ever allow one
instance of MainWindow in the stack. This should help in situations
where you press "Quit" and the app or a chat window is still there.
clear last error already when (re)connecting
properly notify UI of delayed reconnects, thx Argafal