plug in the url manglers with gwc's hook

GWC now has a hook for altering the urls that it generates. This plugs
into that hook, and delegates to the geoserver response utils chain,
which calls all the geoserver pluggable extensions.
added WMS and WMTS support for URL mangling
Fix for URL mangling base paths, and adding WMS and WMTS mangling
Merge branch 'master' into gwc-url-mangling-master
GEOT-4358: added style test for isCoverage filter function
Added support for LayerGroup to the WMS GetLegendGraphic action
fixed some bugs and added forceTitles legend option
Merge pull request #86 from svzdvd/master-isCoverage

GEOT-4358: added style test for isCoverage filter function
Add Web 3D Service as a community module.
Add group.id to w3ds pom. Add w3ds as a profile in web app.
Improving range subsettting code and coverage response delegate class
Make WCS 2.0 work against both lon/lat and lat/lon oriented coverages
 Improved WCS 2.0 GetCapabilities output
Fixing dynamic dimension tests after changes to coverage delegate handlers
fixed layer, style and rule parameters size mismatch; fixed tests not running on linux
GEOS5547 - GSIP84 - LayerGroup: added Mode, RootLayer and RootLayerStyle. Updated WMS GetCapabilities and GetMap
 fix for GEOS-5537, Tiling artifacts with RasterSymbolizer using bilinear interpolation
Merge pull request #97 from simboss/master-upstream

 fix for GEOS-5537, Tiling artifacts with RasterSymbolizer 
adding some required dependencies to groovy artifact
updating test case to add layer before layer group