title: Latest version string in Nuget 3.0
body: <p>In project.json I would like to add dependency to latest version of nuget package in my feed (I use private ones). The only accepted dependency is like:</p>
  
  <pre><code>"dependencies": {
    "ncommon": "[0.0,)"
  }
  </code></pre>
  
  <p>But it looks stupid :). Is there anyway to write <code>"latest"</code> or <code>""</code> or <code>*</code></p>