gtk+ 1.2.0 docs outdated

[Dr Noonian Soong <noonian dreamhaven net>]

I noticed when looking at the 1.2.0 tutorial that many of the docs in the
docs/ dir list the version as 1.0.  In the grand scheme of things, this is
very minor, but might want to be polished for one of the next releases.

Noonian, happy Gtk+ user :)

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==|  Dr Noonian Soong  |===|  Noonian@dal.net  |===|  Noonian on DALnet  |==
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==|  I don't have a life;  I have a program.  --EMH Doctor, _Voyager_    |==
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