Added linreg to SAT demo
Added linreg to SAT demo

korkam/pmtk3,probml/pmtk3,korkam/pmtk3,probml/pmtk3,korkam/pmtk3,probml/pmtk3,korkam/pmtk3,probml/pmtk3,korkam/pmtk3,probml/pmtk3,korkam/pmtk3,probml/pmtk3