title: glad.h giving error that opengl header is included
body: <p>I am trying to use glad.h with my code. I am programming on Visual Studio 2013. For some reason its giving me the error <code>C1189: #error :  OpenGL header already included, remove this include, glad already provides it</code><br>
  Can someone help me with this?</p>
  
  <p>These are the headers that I am including:-</p>
  
  <pre><code>#include &lt;glad/glad.h&gt;
  #include &lt;GLFW/glfw3.h&gt;
  #include &lt;iostream&gt;
  </code></pre>