Agreed: fieldfunctions should be a module (.py file) in the vector calculus package or integrated into the `Vector` and `ReferenceFrame` classes.

I agree that Point should be in the vector calculus package and not in the `mechanics` package. Anywhere I wrote "kinematics" meant I thought it should be in the vector calculus package as opposed to the `mechanics` package.

Also, making `vector` the name of the package is fine. But it should fundamentally mean "vector calculus" as we have things pertaining to vector calculus in physics and not just "vectors".