Merge INSPIRE-SOS extension

Merge the INSPIRE-SOS extension which where described in [this blog](http://blog.52north.org/2014/01/30/52north-supports-the-jrc-in-developing-an-inspire-download-service-based-on-sos/).
The development contains the following features:
- [ISNPIRE extension](https://wiki.52north.org/bin/view/SensorWeb/SensorObservationServiceIVDocumentation#INSPIRE_Download_Service_extensi)
- [Multilingualism](https://wiki.52north.org/bin/view/SensorWeb/SensorObservationServiceIVDocumentation#Multilingualism_support)
- [Coordinate transformation](https://wiki.52north.org/bin/view/SensorWeb/SensorObservationServiceIVDocumentation#CRS_support)