Author: Simey Lameze
MDL-26401 group: add delimiter and encoding fields to import
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4cdcf3a407cde5ec10da5a3b8291d658647e8a51
http://github.com/moodle/moodle/commit/4cdcf3a407cde5ec10da5a3b8291d658647e8a51
+ 3.8 en [csvdelimiter,core_group]
+ 3.8 en [encoding,core_group]