DeferredDocumentTest case added.
Experimenting with making Item Serializable. Starting by switching various .is flags to an EnumSet
Further progress on some Xots infrastructure to include proper handling of NSFComponentModules and thread termination.

This version of Xots is VERY CHATTY. There will be lots of trace messages on the console. That should be cleaned up on my next commit.
Merge remote-tracking branch 'origin/nathan' into jesse