Importing a subfolder without the __init__ method

As of Python 3.3, importing a subfolder without the __init__ method does not raise any exception in test_subfolders_without_an_init_module_are_not_part_of_the_package. Trying to import something from it does the trick. This should fix issue #35 

Signed-off-by: DeK <nofatclips@gmail.com>