Author: Marina Glancy
MDL-38147 Created class coursecat, added cache definition and lang strings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b33389d22884fb65d811e6075915ff8be8513405
http://github.com/moodle/moodle/commit/b33389d22884fb65d811e6075915ff8be8513405
+ 2.5 en [cachedef_coursecat,core_cache]
+ 2.5 en [cannotmovecategory,core_error]
+ 2.5 en [categorynamerequired,core_error]
+ 2.5 en [categoryidnumbertaken,core_error]