Status on TextClient Exceptions

[Susanne Lefvert]

The TextClientWriteDataException that might get raised in TextClient.Input 
is caught and handled by the UI.  But if an exception is raised in 
TextClient.ProcessNetwork, the UI will not be able to handle it since this 
is done in a thread in the TextClient.  One idea would be to have a 
separate callback parameter sent to the TextClient that is called when an 
error occurs in the thread and then outputs a UI message to the user.

Susanne