dqrng v0.2.1

I have blogged about dqrng before, but I forgot to write about the v0.2.0 release, even though that brought a lot of changes including the fast sampling methods to CRAN: Add R side support for selecting multiple streams for parallel usage. Implement long_jump() for Xo(ro)shiro as alternative to jump() providing fewer streams with longer period. Handle R’s RNG scope properly during initialisation. New functions dqsample and dqsample.int using an unbiased sampling algorithm.