fixed major bug in distributedCircuit class, and docs.
fixed major bug in distributedCircuit class, and docs.

the error was that the distributed resistance and conductance
were multiplied by the angular frequency, which is non-sensical.

thanks to Øystein, for noticing this error.

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