Author: Jerome Mouneyrac
MDL-28990 add web service mobile overview
http://git.moodle.org/gw?p=moodle.git;a=commit;h=fa698a15a8ea0e5c4cb8f65759dd0798451e56c5
http://github.com/moodle/moodle/commit/fa698a15a8ea0e5c4cb8f65759dd0798451e56c5
+ 2.2 en [enablemobilewsoverview,core_webservice]
+ 2.2 en [mobilewsdisabled,core_webservice]
+ 2.2 en [mobilewsenabled,core_webservice]