GitLab

Fixed some style issues, made the singleton instance a static object, and added a bit of documentation

Simple uniform random number generator using boost.

At this moment, it is in asiolink, because that is where it is used. It should be moved to a lib/util (or something), together with the non-uniform nsas rng.

Also note that IOFetch now *sets* a random qid, but does not actually check it when it receives an answer.