GEOS-6711: improvements for the authkey module, by mapper parameters and
new webservice mapper
GEOS-6711: added some documentation for the improvements
Merge pull request #778 from mbarto/geos_6711_authkey_webservice

GEOS-6711: improvements for the authkey module, by mapper parameters and new webservice mapper
Merge branch 'master' of git://github.com/geoserver/geoserver