Refactor Mesh vertex attributes into MeshFloatVbo class
Refactor MeshActor to use just one VertexBufferObject
Refactor MeshActor to populate vbo vertices once.
Properly dispose of triangle adjacency index buffer when MeshActor is disposed.
Draw OutlineMaterial only outside of shape edge.
Round off sharp corners of OutlineMaterial.
Push outer edge of outline material deeper into scene.