added the readme

shaders/deferred_lighting.vert

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec2 aPos;
+layout (location = 1) in vec2 aTexCoord;
+
+out vec2 TexCoord;
+
+void main()
+{
+    TexCoord    = aTexCoord;
+    gl_Position = vec4(aPos, 0.0, 1.0);
+}