cleanup
fix travis.yml to fetch the latest release of gae (needs manual update whenever a version changes)
fixed problem with login bare when registration_key is None
Merge pull request #393 from niphlod/fix/tests

fix travis.yml to fetch the latest release of gae
fixed startup message, thanks mweissen
fixed issue 1894:represent requires 2 arguments in dal.py, thanks mweissen
fixed issue 1893:backwards compatibility problem with grid parameter exportclasses, thanks mweissen
fixed issue 1891:Remove response.meta.description from menu.py in welcome app, thanks sourcingp