missing copyright statements

[Dmitri A. Sergatskov]

Since we are on subject of copyright.

I was looking for files in octave-forge
with missing clear copyright statement.
There are quite a few of those.

Here some of them:

main/vrml/
        most files (Etienne Grossmann  <address@hidden>)
        (some files do not have even author name)

main/general/
        deref.cc (?)

main/control/
        feedback.m (Ben Sapp <address@hidden>)

main/image/
        imginfo.m (Etienne Grossmann  <address@hidden>)

        imread.m (Andy Adler)

        imwrite.m (Andy Adler)

        testimio.m

main/irsa/
        irsa_actcore.m ( Joerg Huber ?)

main/linear-algebra/
        GramSchmidt.cc (P.R. Nienhuis <address@hidden>?)

main/optim/
        cdiff.m (?)
        wsolve.m (Paul Kienzle ?)

main/signal/
        flattopwin.m (Paul Kienzle ?)
        freqs_plot.m (Paul Kienzle ?)
        ellipdemo.m (Paul Kienzle ?)

main/symbolic/
        probably_prime.cc (?)

main/specfun/
        expint.f (D.E. AMOS)
        Why do we need this file there at all?

main/struct/
        struct.cc (Etienne Grossmann  <address@hidden>)

main/time/
        datesplit.m  (Bill Denney <address@hidden>)

extra/ver20
        most files (Paul Kienzle)


I think something has to be done about it.

Sincerely,
Dmitri.
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