title: travis-ci cannot build .net project
body: <p>I just pushed a test project for travis to build, but it fails. Error:</p>
  
  <blockquote>
    <p>ConsoleHelpersTests.cs(2,17): error CS0234: The type or namespace name
    <code>VisualStudio' does not exist in the namespace</code>Microsoft'. Are you
    missing an assembly reference?</p>
  </blockquote>
  
  <p>my .travis.yml file:</p>
  
  <pre><code>language: csharp
  solution: TravisDotNet.sln
  </code></pre>
  
  <p>Am I missing something?</p>