New installation instructions modeled off scipy. 
New installation instructions modeled off scipy. 

AlanZatarain/pysal,Alwnikrotikz/pysal,AlanZatarain/pysal,tectronics/pysal,AlanZatarain/pysal,Alwnikrotikz/pysal,tectronics/pysal,Alwnikrotikz/pysal,tectronics/pysal