title: missing android.support.design -
body: <p>I'm trying to compile a simple app on a new Android Studio bundle installation (after windows reinstall). I've got a compile error:</p>
  
  <p>Could not find com.android.support.design:21.0.3</p>
  
  <p>Okay, in sdk\extras\android\m2repository\com\android\support\design folder I can see only 22.x and 23.x subfolders, so 21 is really missing.</p>
  
  <p>However, in sdk\extras\android\m2repository\com\android\support\appcompat-v7 I can see 18,19,20,21,22 and 23 major versions, and there are appcompat-v7:21.0.3 for what I also have dependency.</p>
  
  <p>First question: how could it be possible? I'm using the SDK manager only, no manual hacking. I thought that it was enough to check the needed components and SDK manager downloaded the corresponding versions.
  What can I do to install design:21 ? Or an earlier version?</p>
  
  <p>In SDK manager there's no versions under the entries, I can see only 'Android Support Library' for example, without versions.
  Second querstion: how can be determined the versions to be download in SDK manager?</p>
  
  <p>I can see that an "Android Support Repository" entry exists under Extras, there's a screenshot at <a href="http://developer.android.com/tools/support-library/setup.html" rel="nofollow">http://developer.android.com/tools/support-library/setup.html</a> , for example.
  However in my SDK manager there's no such entry! There's only two that have 'repository' in its name: "Local Maven repository for Support Libraries" and "Google Repository". Both of them are installed.
  Third question: Is it a bug/confusion in my SDK manager? Or...?</p>
  
  <p>When I start Android Studio and my project is loaded it tries to help me giving an error message, like this:</p>
  
  <p>Error:(26, 13) Failed to resolve: com.android.support:design:21.0.3
  Install Repository and sync project
  Show in File
  Show in Project Structure dialog</p>
  
  <p>The "Install Repository and sync project" is a link. When I click it AS brings up a new window with the text below:</p>
  
  <p>Loading SDK information...
  Ignoring unknown package filter 'extra-android-m2repository'Warning: The package filter removed all packages. There is nothing to install.
           Please consider trying to update again without a package filter.</p>
  
  <p>Fourth question: what may cause this? It seems there's no such package exists...?</p>
  
  <p>Thanks in advance,
  F</p>