[q2x] DORIS: Math libs

[Brian Hook]

> I'd suggest looking at Steve Baker's stuff?

Yeah, that's a decent starting point, but I figure writing it from 
scratch (assuming we stick to simple stuff) wouldn't be difficult at 
all.

> Feel free to extend the functionality. What is missing?

Specifying matrix elements directly; M x N matrices; N-element 
vectors; transform, bulk transform, both in row and column major 
forms; lots of other small things.

I still think it should be done in Lua because the binary loadable 
module situation doesn't seem to be well in hand, and right now one of 
my bitter complaints about Lua is that it requires building a whole 
new interpreter to use someone else's package.

For example, something as simple as integrating a new pRNG is just a 
royal pain in the ass.

Brian