Add Ruby 2.1.0 to build matrix
Add Ruby 2.1.0 to build matrix

soupmatt/CASino,aleksandrov1988/CASino,konvenit/CASino,rbCAS/CASino,identification-io/CASino,meanphil/CASino,alepaez/CASino,mBut/CASino,tronnet/CASino,soupmatt/CASino,FronteraConsulting/CASino,qoqa-dev/CASino,tronnet/CASino,konvenit/CASino,alepaez/CASino,mBut/CASino,identification-io/CASino,konvenit/CASino,mBut/CASino,rbCAS/CASino,aleksandrov1988/CASino,qoqa-dev/CASino,FronteraConsulting/CASino,qoqa-dev/CASino,meanphil/CASino,tronnet/CASino,rbCAS/CASino,meanphil/CASino,identification-io/CASino,FronteraConsulting/CASino,soupmatt/CASino,aleksandrov1988/CASino,alepaez/CASino