Added test for rank_and_score
Added test for rank_and_score

harihpr/tweetclickers,geotagx/pybossa,jean/pybossa,OpenNewsLabs/pybossa,inteligencia-coletiva-lsd/pybossa,inteligencia-coletiva-lsd/pybossa,geotagx/pybossa,OpenNewsLabs/pybossa,stefanhahmann/pybossa,Scifabric/pybossa,PyBossa/pybossa,stefanhahmann/pybossa,PyBossa/pybossa,jean/pybossa,harihpr/tweetclickers,Scifabric/pybossa