Added several configurable options for allow end-user to specify how to find duplicate publications

tripal_pub/includes/pub_form.inc

@@ -261,7 +261,7 @@ function chado_pub_validate($node, &$form) {
   if (!$skip_duplicate_check) {  
 
     // make sure the publication is unique using the prefereed import duplication check
-    $import_dups_check = variable_get('tripal_pub_import_duplicate_check', 'title_year');
+    $import_dups_check = variable_get('tripal_pub_import_duplicate_check', 'title_year_media');
     switch ($import_dups_check) {            
       case 'title_year':
         $results = tripal_pub_get_pubs_by_title_type_pyear_series($title, NULL, $pyear, NULL);

tripal_pub/includes/tripal_pub.admin.inc

@@ -55,7 +55,7 @@ function get_tripal_pub_admin_form_importing_set(&$form) {
     '#description' => t('During import, Tripal will attempt to find duplicate publications. 
        There are several options for how to find a duplicate publication.  Choose the
        option that best suits your needs.'),
-    '#default_value' => variable_get('tripal_pub_import_duplicate_check', 'title_year'),
+    '#default_value' => variable_get('tripal_pub_import_duplicate_check', 'title_year_media'),
   );
 }