[doc][s]: refactor docs home page to have user and developer sections.
[doc][s]: refactor docs home page to have user and developer sections.

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