random (3) improvement

[Vincent <10.50%free.fr@localhost>]

Hi there,

I was wondering if our code for "better" random number generation could 
not be replaced by the Mersenne Twister:

http://www-personal.umich.edu/~wagnerr/MersenneTwister.html

Note that the period is 2^19937-1, the randomness is excellent and the 
code is fast and BSD-licenced. It just needs to be converted from C++ to 
C, an easy task I can do if anybody agrees.

Opinions?

Vincent