+ AssetHierarchy: Exposed RootNode
+ ContentBrowserWindow: Fixed Empty Folder not being Leaf-Node
+ TreeNode: Added IsParentOf, IsChildOf and IsInSubtree.
+ Fixed InternalDeleteTreeAndChildren for null trees
+ Some C# UUID stuff
+ Added some Mono functions
+ ScriptEngine:
+ ID -> ScriptInstance map in ScriptEngine
+ GetManagedInstance
+ Fixed Scene not visible after loading a new scene
+ Renamed OnViewportResize to SetViewportSize for Scene and SceneRenderer