Summary of important user-visible changes for sockets 1.2.0:
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 ** Sockets are now represented with ordinary numbers, not a
    custom socket type. If you relied on checks like
    isa(s,'octave_socket') you will need to update your code.

 ** Functions are cleaned on package unload (requires Octave >= 3.8)
    using the PKG_DEL directive.

 ** The sockets package is now dependent on Octave versions >= 3.2.0

 ** Functions now perform better input check to prevent accidental segfaults.

Summary of important user-visible changes for sockets 1.0.8:
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 ** updated function documentation with more details
