[osg-submissions] StateSet api completion

[Mathias Froehlich]

Hi Robert,

I have extended the StateSet api with a

StateSet::removeAssociatedModes(const StateAttribute*)

and a

StateSet::removeAssociatedTextureModes(unsigned, const StateAttribute*)

call. These funktions are just missing for a complete api IMO.

I will make use of that in a upcomming patch.

The attached files are based on rev 7595.

   Please apply

       Mathias

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Dr. Mathias Fröhlich, science + computing ag, Software Solutions
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