Show an example of draggin a marker/label

[JamesLMilner]

Labelgun has the ability to set a label to be 'dragged' which in turn makes it's weight infinite and always shown in the collision calculations. An example in Leaflet or OpenLayers would be super!

Here's an example of how you might do it:

   // The last argument is dragged which we set to true
    labelEngine.ingestLabel(
      boundingBox,
      id,
      parseInt(Math.random() * (5 - 1) + 1), // Weight
      label,
      "Test " + id,
      true 
    );