* For Python3 it's no longer possible to import modules with standard
library names as relative modules.
* Therefore we need to catch and report the error to see if we do notice
that.
* Python3.3: Fix, packages without "__init__.py" didn't have the module
embedded.
* Tests improvement, make sure programs execute without the imported modules
accessible.
* Triggered by Issue#114 it became apparent that the programs test case won't
notice if the recursion does not work at all (which it did on develop at
some point).
* Also check the flags given to the test runner in order to detect typos.
