Changed Django get params used in wms_links lookup to move url to defaults dict.  Prevents duplicate WMS links via repeated updatelayers calls
FGDC Topic Category extraction
Assigns TopicCategory to Layer using extracted metadata.
Added category_list to advanced search context for category filter
Added category filter
Added support for capturing multiple keywords from FGDC metadata.
added OL to search
added UI for search by extent
UI cleanup for extent search
added extent filter to search results page
Updated changelog for version 2.0c6
add missing import in helpers for remove-deleted option
Merge branch 'master' of https://github.com/GeoNode/geonode
doUpload now returns false so the page does not scroll upwards when Upload is clicked
Merge pull request #1304 from batje/patch-1

doUpload now returns false so the page does not scroll upwards when button is clicked
Refactoring migrations.
Added the migration for adding the resourcebase_ptr_id field in layer.
Added the migrations to move layer stuff to base.
correct command
Merge pull request #1309 from calvinmetcalf/patch-1

correct command