Update release notes version

1. Follow the instructions to build and run the *FORTRAN* and *C++* versions of the code.

2. Run the `pycompare.py` script providing the following minimal arguments:

   > $PATH_TO_SCRIPT/pycompare.py --ffile=FORTRAN_OUTPUT --cfile=C++_OUTPUT

   > $PATH_TO_SCRIPT/pycompare.py --ffile FORTRAN_OUTPUT --cfile C++_OUTPUT

(The above assumes that `PATH_TO_SCRIPT` is a variable that expands to the path were the script is located). The required output files are called by default `OSPH` and `OCLU` by *FORTRAN* and `c_OSPH` and `c_OCLU` by *C++*, depending on whether the sphere or the cluster case was executed.