title: Spring Tool Suite (STS)- cant update
body: <p>When i check for updates and i get this this error message:</p>
  
  <pre><code>Cannot complete the install because one or more required items could not be found.
    Software being installed: Spring Tool Suite 3.6.1.201408250821-RELEASE-e37 
  (org.springsource.sts.ide 3.6.1.201408250821-RELEASE-e37)
    Missing requirement: Spring Tool Suite Package 3.6.1.201408250821-RELEASE-e37 
  (org.springsource.sts.package.feature.group 3.6.1.201408250821-RELEASE-e37) requires 
  'org.eclipse.platform.feature.group [3.7.0,4.0.0)' but it could not be found
    Cannot satisfy dependency:
      From: Spring Tool Suite 3.6.1.201408250821-RELEASE-e37 (org.springsource.sts.ide 
  3.6.1.201408250821-RELEASE-e37)
      To: org.springsource.sts.package.feature.group [3.6.1.201408250821-RELEASE-e37]
  </code></pre>
  
  <p>sts version :</p>
  
  <p>Version: 3.6.1.RELEASE
  Build Id: 201408250818
  Platform: Eclipse Luna (4.4)</p>
  
  <p>system  :</p>
  
  <p>ubuntu 14.04</p>
  
  <p>Thanks,</p>