* ItemDefinition can now perform testing on its set of categories w/r to another set using passCategoryCheck(...)
* Added the ability to indicate if any or all of an ItemDefinition's categories need to be in the set passed into passCategoryCheck.  This is controlled by ItemDefinition::setCategoryCheckMode(...)
* Extended both Attribute and Item isValid methods to take in a set of categories.  If an item would fail it's passCategoryCheck based on the input set then isValid will return true since the item's state is being "filtered out"
* Added XML/JSON support for reading/writing ItemDefinition::categoryCheckMode
* Updated qtUIManager, qtAttributeView and qtInstanceView to make use of these new methods