title: Write text in OpenLayers3
body: <p>I need to write some text in openLayers 3... Not a label, something like a text object, that I can select and drag around the map. This text must have multiple lines.
  I tried to use a point with ol.style.text, but it isn't multiline.
  I also tried the popups, but I need the text to be always displayed.
  Is there any way to use a text feature for this (<a href="http://openlayers.org/en/v3.9.0/apidoc/ol.format.TextFeature.html" rel="nofollow">ol.format.TextFeature</a>)?
  Is there any object that I can use for that purpose?
  Thanks!!</p>