modified:   testdata/test2.netlist
modified:   tests/NodalAnalysis.mat
new file:   testdata/test3.netlist
new file:   testdata/test4.netlist
Fix up the error in NodalAnalysis (overwriting impedances when processing new resistor lines).

modified:   NodalAnalysis.m
new file:   g.out
new file:   g.pl
modified:   tests/NodalAnalysis.mat