Add --remove-deleted option to updatelayers.  Remove layers from GeoNode that no longer exist in GeoServer (incl --skip-unadvertised filter). Log results in stdout and debug logs
Modified logic for GeoServer layer comparison for marking valid GeoNode layers
Streamline debug logging statements for GeoNode resource comparison with GeoServer, cleanup
One more debug logging line for better reporting in matching iteration
Merge branch 'master' of https://github.com/GeoNode/geonode
Added code to remove ratings and comments for a layer directly in gs_slurp. Avoid calling geoserver_pre_delete
Removed cleardeadlayers command and updated documentation with descriptions for all updatelayers options
Merge branch 'master' of https://github.com/GeoNode/geonode
Delete layer tag (keywords) references when layer is deleted
Merge pull request #1250 from mwengren/updatelayers_geoserver_sync_deleted_pr

Add --remove-deleted option to updatelayers to sync GeoNode layers with deleted/disabled GeoServer layers
Update domain name to demo.geonode.org in fabfile.py
Remove the cleardeadlayers reference from the Django-apps page.
Improve the settings documentation.

* Add a reference to settings in the reference toc tree.
* Reword the description of the Documents app.
* Reword the description of the Uploader's BACKEND setting.
Document the GeoNode paver commands (Fixes #1169).