Changed @ with matmul for Python 2 compatibility
Changed @ with matmul for Python 2 compatibility

jhillairet/scikit-rf,jhillairet/scikit-rf,jhillairet/scikit-rf,temmeand/scikit-rf,temmeand/scikit-rf,scikit-rf/scikit-rf,temmeand/scikit-rf,scikit-rf/scikit-rf