title: add IOS frameworks & bundle to unity project
body: <p>i have <code>XCODE</code> project that implement speech recognition (OpenEars sdk).
  i am wrapping this class for <code>UNITY3D</code>. <code>OpenEars</code>  gives me this folder that i must add to the project : </p>
  
  <p><img src="https://i.stack.imgur.com/WszAo.png" alt="enter image description here"></p>
  
  <p>i have added the folder manually to the auto generated xcode project unity had build for me.
  but now i want to know how can i tell unity to add this <code>Framework</code> folder automatically to my project.</p>