Allow Ruby 2.0 and 2.1 to fail fast on Travis.
Allow Ruby 2.0 and 2.1 to fail fast on Travis.

Orientation is focused on 2.2 and forward.

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