v1.07

Point release improving MeshUpdate thus adding the ability to update colors
per frame along with some minor additions.

New Features:

• Can now updated colors per frame for both meshes and instanced meshes
• quaternion_multiply adds the long-missing code to combine quaternion rotations
• Camera.orbit creates a sequence of orbiting cameras around a central point

Deprecation:

• update_mesh_without_normals has been deprecated in favor of the new method
  update_mesh_positions