Originally from build #435

Changes

1. Update README.txt and REPOSITORIES.txt (details / cgit)
2. GLSL DataArray/Handler: Remove ShaderState state and pass it through: ShaderState.getShaderState(gl) (details / cgit)
3. minor: update script / vsync changes in test w/ 2 windows (details / cgit)
4. Workaround (Fix) for Bug 502: Multithreading issue w/ libX11 1.4.2 and libxcb 1.7 bug 20708 (details / cgit)
5. NEWT: Add comment in API doc ; Use more generics in impl. (details / cgit)