Comment 20 for bug 1511552

I'm attaching a new patch for this issue, changed in the way we've agreed a long time ago (in November).
That is:

* The Spice exporter now uses a single user field "spice" in order to modify the netlist export.
    spice: node_seq=C,B,E model=NPN

* The following attributes are currently recognised: enabled, prefix, node_seq, model.

* Those spice attributes that are not interpreted by the exporter, are written to the netlist as comments. Then, they can be used for optional post-processing of the generated netlist by a script.

* Most of the postprocessing performed directly by the exporter can be disabled in the netlist generator dialog, if all postprocessing is done by an external script.

* Outdated code/functionality was removed from the spice netlist generator, as was agreed then.

When/if this patch is accepted, I will write down the documentation.
Please, let me know if there is anything else needed for the patch to be accepted.