Update Frontpage Map

#### What does this PR do?
Updates the map on the Front Page.
Add Marker Icons and Marker Colors.
Add colors to other Geojson Features as well

#### Screenshots (if appropriate)
![bildschirmfoto 2014-03-26 um 09 03 26](https://f.cloud.github.com/assets/688980/2522371/e5cd89ba-b4be-11e3-98e4-4207bc2a2d68.png)

#### ToDos:
- Add Filter #105
- Make Adding non-blocking #106