Modified CMake to now find and link GLEW

Slight tweaks to how CMake interacts with VS
Added small OpenGL testing class which draws over the raycasted image
Going to use Gl to start helping with debug / enabling hybrid rendering

shaders/passthrough.frag

@@ -0,0 +1,8 @@
+#version 330 core
+
+out vec4 color;
+
+void main() {
+	color = vec4(0.0f, 0.5f, 0.2f, 1.0f);
+
+}