title: RestKit/RestKit.h' file not found error during xcodebuild
body: <p>I am trying to use Jenkins-CI to auto-build an iOS project that uses Restkit, apparently, restkit resides as a project inside the main project. And the project builds successfully using the XCode-IDE. </p>
  
  <p>But when i use xcodebuild(jenkins uses it, and i did simulate the same) to build the project 
  it gives the</p>
  
  <pre><code>error RestKit/RestKit.h file not found
  </code></pre>
  
  <p>Any clue whats going wrong, can this be corrected by using scheme file? If so how? or can I simulate, how XCode-IDE deals with this?</p>