title: Eclipse Android project Compile with 4.0.3 not loading
body: <p>As the title says, I have a problem with Eclipse when trying to create an Android Project which Compiles with Android 4.0.3 (API Level 15). </p>
  
  <p>I have installed all the needed packages with the SDK Manager.<br>
  So when I choose to compile with 4.0.3, my <code>MainActivity</code> is full of errors (<code>R cannot be resolved to a variable</code>, <code>activity_main cannot be resolved or is not a field</code>, etc.). </p>
  
  <p>The Graphical layout is not loaded as well.<br>
  Worth to mention that it all works fine with the 2.3.3 &amp; 5.1.1 API Levels.<br>
  I tried to change and combine various cases of minSDKVersion and targetSDKVersion, with or without theme, etc.</p>
  
  <p>If anyone has an idea of what's wrong, I would appreciate your time and help.<br>
  I don't have enough reputation points to attach a photo showing the errors</p>
  
  <p>Errors shown in console when I create Android App Project:</p>
  
  <blockquote>
    <p>Found 2 versions of android-support-v4.jar in the dependency list, but not all the versions are identical (check is based on SHA-1 only at this time). All versions of the libraries must be the same at this time. Versions found are: Path: C:\AndroidProjects\appcompat_v7\libs\android-support-v4.jar Length: 1074044 SHA-1: 33b27a8d2a5b87e6eb6c60e87a5374ffbfeacc3a Path: C:\AndroidProjects\TestProject\libs\android-support-v4.jar Length: 1157300 SHA-1: b1fe665b784aa7314d722b2ec17e77f83ba2e717 Jar mismatch! Fix your dependencies</p>
  </blockquote>
  
  <p>And countless number of error lines this type:</p>
  
  <blockquote>
    <p>C:\AndroidProjects\appcompat_v7\res\values-v21\styles_base.xml:75: error: Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionButton'.</p>
  </blockquote>