added a couple more methods

classes/scans_io_index_parser.rb

@@ -55,9 +55,23 @@ module ScansIoTools
     def filenames_for(study_name)
       file_info(study_name).select do |file|
         file['name']
+      end.map do |file|
+        file['name']
       end
     end
 
+    def fingerprints_for(study_name)
+      file_info(study_name).map do |file|
+        file['fingerprint']
+      end
+    end
+
+    def file_urls_for(study_name)
+      file_info(study_name).map do |file|
+        file['name']
+      end
+    end
+    
     def size_for(study_name)
       if file_info(study_name).count >= 2
         file_info(study_name).select {|name| name['size']}