Massive changes: A node is now holding an effect. Each render task flowing through a node creates a new effect instance in order to enable true multi-threading without collisions. The new interface to derive from to create a plugin is EffectInstance. Readers now have an option to specify what to do on a missing frame, though plugins message suite is missing to display proper error messages. Box2D has been renamed to RectI. Tree has been renamed to RenderTree.
fix conflicts