[osg-submissions] osg::Sequence

[Jason Daly]

The current implementation of osg::Sequence does not handle SWING 
animations properly.  Instead of cycling back and forth through the 
entire sequence, it cycles from start to end, then alternates between 
the last two frames.  This is illustrated by the attached .ive file.

Fixes (made against the 2.2.0 release) are also attached.

-- 

--"J"

"I'm a castaway stranded in a desolate land,
 I can see the footprints in the virtual sand."
	--Neil Peart

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