Can't use value types when emitting to specific stream or message id from StormSpout

[jastice]

The MessageIdEmitter and StreamEmitter emit methods allow only AnyRef parameters, unlike the equivalent StormSpout methods, which allow Any parameters. This prevents me from emitting e.g. Int values when using a specific stream or message id.

[velvia]

Hi there, sorry my github account settings seem to be messed up so I'm not getting notified on issues. I'll look into this sometime soon.