title: Error: spawn pycodestyle ENOENT
body: <p>I got this error having linter-pep8 installed. </p>
  
  <pre><code>Error: spawn pycodestyle ENOENT
  at exports._errnoException (util.js:1026:11)
  at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
  at onErrorNT (internal/child_process.js:359:16)
  at _combinedTickCallback (internal/process/next_tick.js:74:11)
  at process._tickCallback (internal/process/next_tick.js:98:9)
  </code></pre>