Europython2014 davidhalter/jedi#361attempt

Works:

  - looking inside new style (``flask_foo``) extensions.

Does not work:

 - completing inside old-style imports because of the ``flaskext`` namespace package.  The test fixture has ``__init__.py`` and tests work;
 - completing the contents of ``flask.ext.``;
 - completing module contents from a full dotted path.