Author: Thomas Wedekind
MDL-69582 tool_customlang: add export langstring feature
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1f4a5e485e1184709568a1879f099996e95276d6
http://github.com/moodle/moodle/commit/1f4a5e485e1184709568a1879f099996e95276d6
+ 4.0 en [cliexportfileexists,tool_customlang]
+ 4.0 en [cliexportheading,tool_customlang]
+ 4.0 en [cliexportnofilefoundforlang,tool_customlang]
+ 4.0 en [cliexportfilenotfoundforcomponent,tool_customlang]
+ 4.0 en [cliexportstartexport,tool_customlang]
+ 4.0 en [cliexportzipdone,tool_customlang]
+ 4.0 en [cliexportzipfail,tool_customlang]
+ 4.0 en [customlang:export,tool_customlang]
+ 4.0 en [export,tool_customlang]
+ 4.0 en [exportfilter,tool_customlang]
+ 4.0 en [nolocallang,tool_customlang]