Add documentation for upload configuration
Add documentation for upload configuration

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