added shunt_capacitor and shunt_inductor construction tests, because they dont work!
added shunt_capacitor and shunt_inductor construction tests, because
they dont work!

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