Coin: New Features in Coin v4.0.8

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New Features in Coin v4.0.8

This is a bugfix release.

Bug fixes:

- Refactor OpenGL version check to use cc_glglue (get around Intel driver issue).
- Export the include directories for in-tree builds.
- Extract shader GLRender logic into helper.
- Refactor SoVertexArrayIndexer render() to take SoState*.
- Removed Boost from Coin.
- Fix tests with disabled VRML97 support.