Fix DELETE action for an app. Closes #536
Fix DELETE action for an app. Closes #536

CulturePlex/pybossa,Scifabric/pybossa,OpenNewsLabs/pybossa,geotagx/pybossa,harihpr/tweetclickers,OpenNewsLabs/pybossa,proyectos-analizo-info/pybossa-analizo-info,PyBossa/pybossa,CulturePlex/pybossa,jean/pybossa,geotagx/geotagx-pybossa-archive,geotagx/pybossa,proyectos-analizo-info/pybossa-analizo-info,Scifabric/pybossa,harihpr/tweetclickers,stefanhahmann/pybossa,CulturePlex/pybossa,jean/pybossa,geotagx/geotagx-pybossa-archive,PyBossa/pybossa,proyectos-analizo-info/pybossa-analizo-info,inteligencia-coletiva-lsd/pybossa,geotagx/geotagx-pybossa-archive,geotagx/geotagx-pybossa-archive,inteligencia-coletiva-lsd/pybossa,stefanhahmann/pybossa,geotagx/geotagx-pybossa-archive