Added SFMT prng.

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+Here are some data to make parameter files in this directory.  Using
+one same pesudorandom number generator for generating multiple independent
+streams by changing the initial values may cause a problem (with
+negligibly small probability). To avoid the problem, using
+diffrent parameters for each generation is prefered. See Matsumoto
+and Nishimura [1] for detailed information.
+
+Here we put some csv files for parameters of SFMT
+giving several different period length. For each period,
+we list 32 distinct sets of parameters.
+
+You can make parameter files from csv files using scv2params.awk
+
+./csv2param.awk line-no csv-filename > parameter-file
+
+Here, line-no is a number of range 1 to 32 which specifies the line no
+of csv file.
+
+[1] Makoto Matsumoto and Takuji Nishimura,
+    "Dynamic Creation of Pseudorandom Number Generators",
+     Monte Carlo and Quasi-Monte Carlo Methods 1998, Springer, 2000, pp 56--69.
+     http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/ARTICLES/articles.html