If GetProperty recursively walked up the content tree to the first node that defined the property and eventutally found it, and the NodeType[Alias] of the node it was found on was not a parent of the original content's node type, then the lookup would fail.
Changed DynamicBackingItem.GetProperty (and PropertyResult class) to return the Node/Context where the property is being returned from and used this context's NodeTypeAlias as the in the data type lookup.
Fixed recursive property null reference problems
Fixed issue with node having no children and property check crashing
Made DynamicXml behave more consistently based on user feedback
Added IsNull and HasValue to PropertyResult (comes back from GetProperty but you may need to cast it)
Added new Model.IsNull(string alias, bool recursive) and Model.HasValue(string alias, bool recursive) and Model.IsNull(string alias) and Model.HasValue(string alias)
