title: atom text editor: autocomplete doesn't work
body: <p>I started using atom IDE for writing HTML+ CSS code. 
  autocomplete-atom-api is activated and still no code is completed neither automatically nor when I press ctrl+space. </p>
  
  <p>This is my keymap.cson file:</p>
  
  <pre><code>'.active.pane':
    'ctrl-space': 'autocomplete:toggle'
  </code></pre>
  
  <p>Do you know what can be the problem? </p>