Reports generated in external folder

[pedropaulofb]

When the user explicitly passes the arguments for the OntCatOWL execution, the final report is printed as follows:

• ./reports (inside the project's folder)

However, if the user provides no argument and the default arguments are used, the OntCatOWL generates the report into the incorrect folder:

• ../reports (inside the project's parent folder)

The module to be changed is the report_printer.py.

This issue was originally described in issue #14