Rather than some random implementation of a [LCG](http://en.wikipedia.org/wiki/Linear_congruential_generator) from some guy's blog, with no license attached, using constants of questionable quality, I'd rather include a proper BSD-licensed [Mersenne Twister](http://en.wikipedia.org/wiki/Mersenne_twister) from here:

https://gist.github.com/banksean/300494

since it's almost the same amount of code for a much higher quality of randomness, especially since we can comment out the parts of the MT that we don't need.