title: Seaborn lmplot with equation and R2 text
body: <p>In my regular data analysis work, I have switched to use 100% python since the seaborn package becomes available. Big thanks to this wonderful package.
  However, One excel-chart feature I miss is to display the polyfit equation and/or R2 value when use the lmplot() function. Does anyone know an easy way to add that?</p>