OpenGLRaw-3.0.0.0: README.md

[![Hackage](https://img.shields.io/hackage/v/OpenGLRaw.svg)](https://hackage.haskell.org/package/OpenGLRaw) [![Build Status](https://travis-ci.org/haskell-opengl/OpenGLRaw.png?branch=master)](https://travis-ci.org/haskell-opengl/OpenGLRaw)