frame buffers now cleaned up on shutdown

src/graphics/opengl/glGraphics.cpp

@@ -104,7 +104,13 @@ namespace lunarium
 
     void OglGraphics::Shutdown()
     {
-        // TODO: Clean up frame buffers
+        // Clean up frame buffers
+		for (auto iter = mFrameBuffers.begin(); iter != mFrameBuffers.end(); iter++)
+		{
+			delete iter->second;
+		}
+
+		mFrameBuffers.clear();
     }