Update installation instructions links.
Update installation instructions links.

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