AngleStatistics should be able to handle multiple angular state variables

[connorworley]

Currently only one angle index is passed in, but there are cases where multiple angular state variables may be desired (ex robot heading and turret heading).

[connorworley]

Planning on doing this unless someone else is already on it.

[calcmogul]

Go ahead. Are you planning to add an overload that takes an array of indices?

[connorworley]

Yep, that's what I was thinking