From Colin Cochran, OES support for point sprites
Merge branch 'master' of https://github.com/openscenegraph/osg into Dev
From Wang Rui, "The Python header will look for its libraries using "#pragma comment(lib,"python32_d.lib")" for MSVC. So user-specified libraries will not really be set for the osgdb_python plugin. This small fix may help locate the Python libraries after putting the CMakeLists.txt into src/osgPlugins/python

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Merge branch 'master' of https://github.com/openscenegraph/osg into Dev