Move Random number generators into their own package (Redzen.Random?)

[colgreen]

Redzen originated as a collection of classes I had written for use elsewhere, and I wanted a central place where I could develop and maintain them. Going forward I think it makes sense to split the random number generator classes into a distinct project/package that is focused on one goal, and the remaining code can remain in the original 'Redzen' package for now - much of that other code is loose ends that don't belong together, but that is a separate problem for another time.

[fenghou1st]

Agree.