title: Leaflet JS: Hiding API key of map tile provider
body: <p>I know this may come off as a very noob question.</p>
  
  <p>I'm using Leaflet JS for mapping purposes in my application. For the mapping tile providers, I setup both MapQuest and Cloudmade.
  Both of them have a format similar to </p>
  
  <pre><code>tileserver.com/SOME_PARAMS/API_KEY/TILE_NUMBERS
  </code></pre>
  
  <p>to fetch the appropriate tiles to show in the map container.</p>
  
  <p>What I'm confused is how can I keep the tiling javascript API key hidden from end users?</p>