modified `io.io.write` to use pickling protocol 2, due to a incompatablity between windows and linux of protocol 1
modified `io.io.write` to use pickling protocol 2, due to a
incompatablity between windows and linux of protocol 1

scikit-rf/scikit-rf,hohe/scikit-rf,aerialist/scikit-rf,temmeand/scikit-rf,Ttl/scikit-rf,willhaines/scikit-rf,Ttl/scikit-rf,temmeand/scikit-rf,jhillairet/scikit-rf,aerialist/scikit-rf,scikit-rf/scikit-rf,hohe/scikit-rf,hohe/scikit-rf,Ttl/scikit-rf,jhillairet/scikit-rf,gibbons/scikit-rf,temmeand/scikit-rf,gibbons/scikit-rf,willhaines/scikit-rf,Ttl/scikit-rf,aerialist/scikit-rf,jhillairet/scikit-rf,hohe/scikit-rf,willhaines/scikit-rf,willhaines/scikit-rf,gibbons/scikit-rf