title: SDWebImage/UIImageView+WebCache.h file not found
body: <p>I'm trying to use SDWebImage in my iPhone app. 
  I followed the step by step tutorial to install SDWebImage into my Xcode project.</p>
  
  <p>When I try to build my app i'm getting  the following error:</p>
  
  <pre><code>Lexical or Preprocessor Issue
  'SDWebImage/UIImageView+WebCache.h' file not found 
  </code></pre>
  
  <p>Can somebody help me solve this issue?</p>