README added

README

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+OpenGL Example Collection
+-------------------------
+
+The purpose of thise example collection is to provide short and self
+contained code that showcases OpenGL api functionality/features.
+The examples have no dependencies on any custom framework or basecode
+except for "canonical" libraries such as glfw, gl3w and glm.
+
+Most of the examples try to show the targeted features in a relevant
+use case such as using Frame Buffer Objects for FXAA, Transform Feedback
+to update particles on the GPU or Occlusion Queries + Conditional Render
+to optimize rendering a Cube (Minecraftlike) Cave. At the same time
+the goal is to keep the examples short and simple enough to not lose
+the focus.