Further implementations
Add XLINK decoder/encoder and HrefAttribute representation
Change database model selection from boolean to choice setting
Further implementations to support eReporting. The following functionality is implemented:
- query additional information from database
- create observation as defined in the eReporting user guide
Further implementations to support AQD eReporting:
- Support for responseFormat 'http://dd.eionet.europa.eu/schemaset/id2011850eu-1.0'
  - Observations are encoded as described in the AQD User Guide v3.0 and
  - Observations are returned as members of a gml:FeatureCollection
Merge remote-tracking branch 'carsten/feature/eReporting' into feature/eReporting

* carsten/feature/eReporting:
  Further implementations to support AQD eReporting: - Support for responseFormat 'http://dd.eionet.europa.eu/schemaset/id2011850eu-1.0'   - Observations are encoded as described in the AQD User Guide v3.0 and   - Observations are returned as members of a gml:FeatureCollection
  Further implementations to support eReporting. The following functionality is implemented: - query additional information from database - create observation as defined in the eReporting user guide
  Change database model selection from boolean to choice setting
  Further implementations

Conflicts:
	hibernate/datasource/common/src/main/java/org/n52/sos/ds/datasource/AbstractHibernateDatasource.java
dynamic sidebar navigation for eReporting header editing page