Add note about license in README
Add note about license in README

codio/orientation,Scripted/orientation,hashrocket/orientation,cmckni3/orientation,Scripted/orientation,codeschool/orientation,robomc/orientation,jefmathiot/orientation,cmckni3/orientation,orientation/orientation,smashingboxes/orientation,splicers/orientation,friism/orientation,codeschool/orientation,codeschool/orientation,IZEA/orientation,twinn/orientation,ferdinandrosario/orientation,ferdinandrosario/orientation,orientation/orientation,cmckni3/orientation,smashingboxes/orientation,splicers/orientation,Scripted/orientation,hashrocket/orientation,robomc/orientation,codio/orientation,friism/orientation,orientation/orientation,splicers/orientation,IZEA/orientation,liufffan/orientation,jefmathiot/orientation,orientation/orientation,liufffan/orientation,LogicalBricks/orientation,twinn/orientation,LogicalBricks/orientation