preventing WPSInitializer from producing unecessary event traffic
Merge pull request #119 from jdeolive/wps_events

preventing WPSInitializer from producing unecessary event traffic
- Updated ImageIO-EXT GDAL section with references to latest release
trivial improvement to the GDAL documentation
Merge branch 'master' of https://github.com/geoserver/geoserver into master-upstream