Sloppy directory checking in MapAndGo.py in 5ac928d and before

[Abel Vertesy]

if any dir exists, it does not recreate the bash_files dir, and exits with an error.

Valid: 5ac928d and before

[Abel Vertesy]

Here was a bug

@line ~107

    if not os.path.isdir(argv_imput["-counts_out"]):
        os.mkdir(params["-bash_out"])