MeshSetClonesContainer for Alternativa3D v8

A modified MeshSet class that allows you to create a dynamic hierachy of meshes (or just a single mesh) (all sharing the same material) which can than be cloned, and than dynamically added  and removed from this container to support batch rendering at varying numbers. Depending on your settings (meshes per surface) and how many meshes are found in your hierachy, you could batch render a certain number of mesh-hierachies at once, saving on your draw calls! The advantage of using this over MeshSet is that this container is supports dynamic cloning, allowing you to add/remove the clones as you wish, as well as reusing a much smaller geometry footprint per batch draw call instead of naively saving entirely static duplicate geometry like what MeshSet does. These 2 differences make it work great with particle systems and crowds. This container isn't recursive, though, and it should not exist under another MeshSet or MeshSetClonesContainer.