Use the Ingress intel map's icons in exported kml

This used the icons from the Ingress intel map in the exported kml to indicate the portal's level. This uses the icon's resonator count to indicate the portal's level but until I figure out how to overlay a number I find this more useful.

![Screen Shot 2013-03-12 at 9 38 43 AM](https://f.cloud.github.com/assets/1621917/248849/d88ec5c4-8b1c-11e2-9a8b-b3427a9ae9c5.png)