title: How can I ignore emacs tempfiles in require_tree directives for snockets?
body: <p>I am using snockets to construct my app.js like so:</p>
  
  <pre><code>//= require .bower_components/foo/foo.js
  ...
  
  //= require_tree ./directives
  //= require_tree ./services
  ...
  </code></pre>
  
  <p>I also use emacs, which means that when I use grunt to run this with:</p>
  
  <pre><code>snockets:
    'ui':
      minify: false
      src: 'app.js'
      dest: '_dist/app.js'
  </code></pre>
  
  <p>It errors out due to tempfiles:</p>
  
  <p><code>Error: ENOENT, no such file or directory '/Users/apolishc/github/app/directives/.#foo.js'</code></p>
  
  <p>How can I pass snockets a list of patterns for files to ignore under require tree (tempfiles for emacs/vim/w/e)?</p>