Author: Simey Lameze
MDL-26401 group: add delimiter and encoding fields to import
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8668a5a53677310aae24d149cc0f082eaebbc975
http://github.com/moodle/moodle/commit/8668a5a53677310aae24d149cc0f082eaebbc975
+ 4.0 en [csvdelimiter,core_group]
+ 4.0 en [encoding,core_group]