added two scripts that generate and then preprocess the input tasks of RERS'14, to obtain the tasks as used for our submission; the original input tasks are available online at http://www.rers-challenge.org/2014Isola/index.php?page=problems

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/rers2014@13571 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c