Add logo for documentation
Add logo for documentation

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