* Renamed returnCode to statusCode (as per RFC https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html)
* Expose statusCode to server iface
* API Break: Renamed getHeader() to header() Qt-style
* Split server plugin filter tests in its own test file
* Added tests for clearBody() and body() getter
- Add server exception base class
- Enable per service exception definition
- Handle QgsException gracefully (error 500)
- Handle OGC exception versioning
Fix typo in doc and comments
Update documentation
Fix return of implicitely shared objects
Fix order of parameters in QgsServiceRegistry::registerService