First CRAN release for dqrng

The dqrng package is now available from CRAN. It is possible to install it using

install.packages("dqrng")

Besides this simplified installation the included RNGs have been updated: Xorshift128+ and Xorshift1024* have been removed in favor of the new Xorshiro256+, c.f. http://xoshiro.di.unimi.it/. Using the provided RNGs from R is unchanged:

library(dqrng)
dqRNGkind("Xoroshiro128+")
dqset.seed(42)
dqrunif(5, min = 2, max = 10)
## [1] 4.498747 9.500660 2.457009 5.249195 2.370585
dqrnorm(5, mean = 3, sd = 5)
## [1]  5.748100 -4.368370 -1.231515 -7.552863  8.959892
dqrexp(5, rate = 4)
## [1] 0.002043171 0.261604407 0.132934079 0.048892818 0.549762841