ComputeCenterOfMass always returns false

[Mik-pe]

While trying out version 4.0 of this library, I found that there was no implemented version of ComputeCenterOfMass which returns true, or sets the value of the center of mass to other than 0.

Is it suggested to implement this function in an inherited class, or is this intentional?

[jratcliff63367]

Sounds like it just got missed in the refactor of the code. I'll see about hooking it up.