Add reminding message

shaman_bioblend.py

@@ -933,7 +933,7 @@ class galaxy(Thread):
                         self.zip_archive(list_downloaded_files, zip_file)
                         # Send email
                         # solve file size problem
-                        message = ("Shaman result is available for the key {0}"
+                        message = ("""Thank you for using SHAMAN. The result is now available for the key {0}. Please cite the paper: https://pubmed.ncbi.nlm.nih.gov/32778056/ to help us maintain SHAMAN in time."""
                             .format(self.data_task["name"].replace("file", "")))
                         self.send_mail(message, zip_file)
                         shutil.move(self.task_file, self.done_dir +