[kepler-dev] change to ActorMetadata

[Chad Berkley]

Hi,

I've removed the icon package from the core module (and added it to 
util) in my quest to get gui components out of core.  In the process, I 
had to alter ActorMetadata because it included calls to add icons. 
ActorMetadata now allows handlers to be added that can process the moml 
generated from ActorMetadata.  Ostensibly, this is for the GUI 
applications, but could be used for other applications as well.

If you see any weird stuff going on with icons in the newest revision of 
Kepler, please let me know.

Now that I believe I have removed (what I believe to be) the last gui 
component from core, I'm going to attack util and try to move the gui 
components from util to the gui module.  See bug 4246 for more info: 
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=4246

Thanks,
chad