Create atten7_Kirk_ATTEN5_mersenne.c

gcc version of Kirk ATTE5 FY77 program converted to atten7.f95 then gcc 
     DLW: W9DKI 14 Jan 2012:

   Includes inline,  dsfmt.c:   Copyright (C) 2004, Makoto Matsumoto and Takuji Nishimura

  For statements in inner loops
   using C, changed to base 0c  arrays and indexing rather than fortran 77 and then F95 base 1
   with 64 bit Mersenne twister random number generator, dsfmt

   compile with:
      gcc -Wall -lm -O2 -o atten7_merseene atten7_merseene.c - lm -lrt