Fixed an issue where items with no browseCategory defined would throw an error, causing the resource type filter to fail to work.  Those records are now included and have the 'unknown' icon next to them.  Also fixed an issue where an item w/ no related links or children would place an empty box (div) with a border below the item.
Merge pull request #79 from USGS-CIDA/GLRIDB-307_Resource_Type_Facets_Dont_Work

Fixed an issue where items with no browseCategory defined would throw an...