Update Front Page Map

#### What's this PR do?
Adds Marker and GeoJSONs to the front page map
removes the ArcGIS Server from the city

#### Any background context you want to provide?
The task is slow since >1000 projects will be parsed and added to the map 
should be done in a background thread

#### Screenshots (if appropriate)
![bildschirmfoto 2014-03-25 um 23 00 45](https://f.cloud.github.com/assets/688980/2519150/8a1939a8-b46d-11e3-8159-d7a5e26f5ac4.png)

#### ToDo:
- Icons
- Colors
- Do not show all at once