Fix issues bcit-ci#44 & bcit-ci#110

Author: narfbg

system/libraries/Upload.php

@@ -747,6 +747,8 @@ public function clean_file_name($filename)
 				';',
 				'?',
 				'/',
+				'!',
+				'#',
 				'%20',
 				'%22',
 				'%3c',		// <

user_guide_src/source/changelog.rst

@@ -215,6 +215,7 @@ Bug fixes for 3.0
 -  Fixed a bug (#1314) - sess_destroy() did not destroy userdata.
 -  Fixed a bug (#1349) - get_extension() in the :doc:`File Uploading Library <libraries/file_uploading>` returned the original filename when it didn't have an actual extension.
 -  Fixed a bug (#1273) - E_NOTICE being generated by :doc:`Query Builder <database/query_builder>`'s set_update_batch() method.
+-  Fixed a bug (#44, #110) - :doc:`Upload library <libraries/file_uploading>`'s clean_file_name() method didn't clear '!' and '#' characters.
 
 Version 2.1.1
 =============