paths on Windows have to use backslashes

[PiotrAniola82]

When calling javacore_analyser_batch with a command line parameter of the output path, the path specified only works if backslashes are used on Windows. More specifically, the same character os.sep returns has to be used by the end user when calling the script.

Using forward slashes, although in general allowed on Windows, in this case will fail with a 'Security Exception' due to

        if not data_output_dir.startswith(output_dir):
            raise Exception("Security exception: Uncontrolled data used in path expression")

in javacore_set.__create_output_files_structure.

This should at least me documented.