Improved argument parsing
Improved argument parsing

* Warns when numbers are malformed
* Warns when there are positional arguments that are thus ignored
* closes #6

Signed-off-by: Olivier Tilmans <e3ca277cf581a3663c41c5c87d7bab77c3e7d69f@uclouvain.be>

oliviertilmans/LINGI1341-linksim