Implement #1511 geo-distance-filter in kibana filter list

Implemented as follows

![kibana-geospatial-filter1](https://cloud.githubusercontent.com/assets/1858839/4486891/077f8480-49ef-11e4-88d6-6d8506b26e72.JPG)
![kibana-geospatial-filter2](https://cloud.githubusercontent.com/assets/1858839/4486890/077d0cf0-49ef-11e4-823e-ce3e5b663094.JPG)
![kibana-geospatial-filter3](https://cloud.githubusercontent.com/assets/1858839/4486892/0789eb0a-49ef-11e4-9370-afec41bf7fe1.JPG)