ADD pass ref into removeannotations hook in image_processing

git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5506 c08608d7-6e46-0410-86ca-f2a6f1370df5
FIX Negated user search filter was not implemented in match_filter, allowing users to view excluded resources by entering the IDs directly

git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5507 c08608d7-6e46-0410-86ca-f2a6f1370df5
ADD option to create usernames from full name (eg. John Hob -> John_Hob)
	Note: by default it's set to false


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5508 c08608d7-6e46-0410-86ca-f2a6f1370df5
FIX More incompatibilities between transform plugin and GraphicsMagick resolved

git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5509 c08608d7-6e46-0410-86ca-f2a6f1370df5