KDL added

-Added kentucky profile
-Removed dpla-list-records requirement for set
-Added length check to content returned from ListSets. If lenght
 is less 2 or less, sets the profile name as the set name
-Added kentucky_identify_object module
-Removed error on empty "rights" from *_identify_object modules
-Added base class identify_object in akara configuration to hold
 status constants