[GEOS-6755] GSIP 119 - WPS clustering of asynchronous requests - architecture refactor to allow pluggable status sharing
[GEOS-6755] GSIP 119 - Hazelcast based status store
[GEOS-6755] GSIP 119 - Adding heartbeat so that long procesess not reporting progress won't have their resources expired by mistake
[GEOS-6759]: Adding overviewPolicy management as WCS20 extension
Merge pull request #814 from dromagnoli/GEOS-6759

[GEOS-6759]: Adding overviewPolicy management as WCS20 extension
Merge pull request #810 from aaime/wps_cluster_hz

WPS clustering - with Hazelcast based store
Exposing style generator from importer
Fixing nightly build compile/build failures in wps-download
[GEOS-6770] Allow flow controllers access to the current Operation
Have the artifact store work with a NIO lock directory inside GEOSERVER_DATA_DIR/tmp
[GEOS-6776]: Restoring grib community module in the release, previously removed due to issues with the opengeo to boundless switch
[GEOS-6779]: Fixing NetCDF WCS request after fix made with GEOS-6757
Fixing community processes using the old storage cleaner hack to save raw outputs
Merge pull request #824 from dromagnoli/GEOS-6776

[GEOS-6776]: Restoring grib community module in the release, previously ...
[GEOS-6781] WPS does not report progress of chained processes
GEOS-6775: removed wrong content-length header from gzipped content
Merge pull request #827 from mbarto/geos6775

GEOS-6775: removed wrong content-length header from gzipped content
Update grib.rst
Merge pull request #829 from bradh/patch-3

Update grib.rst
Merge pull request #825 from dromagnoli/GEOS-6779

[GEOS-6779]: Fixing NetCDF WCS request after fix made with GEOS-6757