[math4] pure python may be a bad idea

[Christian Horne]

... and why?
because python is relatively slow.
i'm not saying that python in general is bad, but everything that can be
coded as a C/C++ PYModule probably should be, as python is noticably slower.

i can say this for sure, not just because of all the places you hear that
interpreted is slower (and i'm not saying they're wrong) but because
XFCE runs at least 2x faster on my XO than sugar does.

the blendmaster