Matrix unit

[dmantione]

To enumarate everything that I expect from the vector/matrix unit, I would have to paste here the interface of my whole VectorMath unit BTW, you have complete permission to reuse any parts of my VectorMath unit for FPC Matrix unit, under FPC RTL license.

Thanks! I've already been thinking about adding more geometry code, however, I decided to watch what the response to the matrix unit was, the FPC to do list is long as ever