- add Logging trait for nicer interface
- add EventHandlerLogging class for offering the nice interface from
app.log
- add eventHandler instance to app and use that for all internal logging
(this means that some places (dispatchers, remoting) were infiltrated
by app just to do logging, but I think we'll need app in there soon
enough for other reasons)
someone should look at remoting vs. timeout (i.e. which is sent around),
because I removed that in some places. It might simply be irrelevant
once we remove the Future special-casing.
