Allowing rascal-msr to run and include a working example

The current master branch of rascal-msr is outdated because of  two minor changes. When you are new to this project, you have no idea why it doesn't work.  After mailing Jurgen, the fix was made clear. It would be useful to add it to upstream though.

Secondly, the (git) examples in there are not exactly fully functional. Because documentation is lacking as well, it took me some time to get started. I therefore propose to add a little working demonstration to the experiments folder.