Author: Dongsheng Cai
MDL-13766, fixed repository instance name and configplugin language string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=52082e5bd8da8f34950d4ddf61d17b85d53aac9a
http://github.com/moodle/moodle/commit/52082e5bd8da8f34950d4ddf61d17b85d53aac9a
+ 2.0 en [configplugin,repository_picasa]
+ 2.0 en [configplugin,repository_url]
+ 2.0 en [configplugin,repository_wikimedia]
+ 2.0 en [configplugin,repository_youtube]