Xml Serialization
#CHANGE: XmlFormatter Arrays now omit trailing default elements.
Serialization, Bugfixes
#ADD: Improved Serialization Unit Tests to include MemberInfo, Delegate and Enum data.
#CHANGE: Refactored Formatter classes to wrap their serialization data in an ObjectHeader instance.
#FIX: Fixed null object check regarding MetaFormat serialization that sometimes caused regular and meta-formatted data to be out of sync.
#FIX: Fixed ObjectIdManager returning a zero id in certain cases.
#FIX: Fixed DualityApp.LoadPlugin rejecting plugins that are re-added after the engine has been shut down and re-initialized.