Altered WCS link generation method width/height

Fixes #1356; WCS links should now return their native grid height and width
based on the WCS describeCoverage spatial grid.
Also changed how links are generated so that when fetching URLs on
very coverages the server does not need to issue several getCoverage for the
 entire grid extent of the coverage, which would ordinarily bog down the server
for large coverages.
Ensure proper configuration when using the geonode.importer backend.
Add comments on DEBUG and DEBUG_STATIC in the local_settings.py
Updatelayers -w option nows correctly skip any layer if the workspace does not exist.
This fixes #1378. We should refactor the whole thing, but for now it works.
Removed a small typo.
Enable resource link selection in document metadata form.
Merge pull request #1380 from capooti/doc-resource-in-metadata

Enable resource link selection in document metadata form.
Added South Sudan to base COUNTRIES enumerator.
Now using GeoExplorer 4.0.2 and added back the MousePosition control. Thanks Ariel for packaging!
Manage the previously unhandled case of a document with unlinked contents.
'Japanese' was wrongly translated as 'person' instead of 'language'
Merge pull request #1387 from dkastl/master

'Japanese' was wrongly translated as 'person' instead of 'language'
update pycsw
bump pycsw
Generate thumbnails for documents.
Merge pull request #1379 from capooti/issue-1378

This fixes #1378.
make search extent map show up when not url params are present
include spatial search in every list page but the home
don't include the ext css in the spatial search