Merge branch 'master' of https://github.com/GeoNode/geonode
partial fix for #1257, map download null.zip

pass the title of the map along to geoserver
add doc about this method and the readme field
Change priority of geoserver's package
Added code to remove ratings and comments for a layer directly in gs_slurp. Avoid calling geoserver_pre_delete
Merge branch 'updatelayers_geoserver_sync_deleted_pr' into geoserver_updatelayers_dev
Updated changelog for version 2.0c5
Remove "or groups" from the upload template until group permissions are supported.  Fixes #1262.
Removed cleardeadlayers command and updated documentation with descriptions for all updatelayers options
Merge branch 'master' of https://github.com/GeoNode/geonode
Merge branch 'updatelayers_geoserver_sync_deleted_pr' into geoserver_updatelayers_dev