prepare document detail for metadata links
connect the catalogue to the document save
remove the unwanted tag
fix documents models
update search tests to reflect the new documents global bbox
Merge branch 'master' of https://github.com/GeoNode/geonode into doc-metadata

Conflicts:
	geonode/documents/templates/documents/document_detail.html
Create contribute_docu.md
Update contribute_docu.md
Update contribute_docu.md
Create contribute_to_docu
Delete contribute_to_docu
Create index.txt
Create contribute_docu.md
Update contribute_docu.md
Create install_postgresql.md
Update install_postgresql.md
Update install_postgresql.md
Create install_postgis.md
Create install_geonode_in_devmode.md
Update install_geonode_in_devmode.md