Removed include/osg/Version and include/OpenThreads/Version headers as these are autogenerated.

Changed the paths for the OpenThreads/osg Version headers to be placed in the PROJECT_BINARY_DIR.


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14557 16af8721-9629-0410-8352-f15c8da7e697