title: Appharbor fails to publish asp.net mvc 4 application
body: <p>Trying to launch my project on appharbor and it fails with this:</p>
  
  <blockquote>
    <p>"D:\temp\cijsrn4n.1kq\input\TinyBlogMvc4.sln" (default target)
        (1) ->
        "D:\temp\cijsrn4n.1kq\input\TinyBlogMvc4\TinyBlogMvc4.csproj" (default
        target) (2) ->       (_CopyWebApplicationLegacy target) ->
        C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v10.0\WebApplica
        tions\Microsoft.WebApplication.targets(178,5): <strong>error MSB3021: Unable
        to copy file "obj\Debug\build.force"</strong> to "D:\temp\cijsrn4n.
        1kq\output_PublishedWebsites\TinyBlogMvc4\obj\Debug\build.force".
        Could not find a part of the path 'obj\Debug\build.force'.
        [D:\temp\cijsrn4n.1kq\input\TinyBlogMvc4\TinyBlogMvc4.csproj]
        C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v10.0\WebApplica
        tions\Microsoft.WebApplication.targets(178,5): <strong>error MSB3021: Unable
        to copy file
        "obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache"</strong> to
        "D:\temp\cijsrn4n.      1kq\output_PublishedWebsites\TinyBlogMvc4\obj
        \Debug\DesignTimeResolveAssemblyReferencesInput.cache". Could not find
        a part of the path
        'obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache'.
        [D:\temp\cijsrn4n.      1kq\input\TinyBlogMvc4\TinyBlogMvc4.csproj]</p>
  </blockquote>
  
  <pre><code>          0 Warning(s) 2 Error(s)
  </code></pre>
  
  <p>It builds on my pc just fine, any ideas what I'm missing?</p>
  
  <p>.NET Framework version is 4.0</p>