Author: Marina Glancy
MDL-31901,MDL-28666: add support for external references in new filepicker design
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5cf44c1f1fa2ec317bc5c6395820ad069cc88abc
http://github.com/moodle/moodle/commit/5cf44c1f1fa2ec317bc5c6395820ad069cc88abc
+ 2.3 en [makefileinternal,core_repository]
+ 2.3 en [makefilelink,core_repository]
+ 2.3 en [makefilereference,core_repository]