CogVM sources as per VectorEnginePlugin-jmv.21

Implement new V7 API.
- UTF-8 / UTF-32 / ByteString text display
- Multi level clipping of convex morph areas
- Dashed lines
- Performance optimizations (average 5 times faster)
- Uses pinned arrays for passing state into the plugin
- Support for both opaque and translucent targets in all modes

Author: eliotmiranda