We just want to make sure our netlist exporter works. Being
deterministic is the simulator's job, not ours, though perhaps we should
investigate that too eventually.
`linearize` command resamples the data. Fourth and further digits from
decimal point are cut off by using `wrdata` command instead of `write`.
Oddly, "sources" unit test is not working (so it's still uncommented) --
some substantially different values are generated when generating the
reference with standalone Ngspice.
Unfortunately, Windows headers define a lot of macros for common words,
so we had to rename some enums to not collide.
We also fix some of the many bugs related to the new simulation
architecture and the Spice Model Editor dialog.