Updated mediawiki/extensions
Project: mediawiki/extensions/WikiLexicalData  2cf0a638eb785ec700bf7906049b629136048fed

Created Expressions Class;Jobs cleaned;some Setup

*P2 changes according to recommendations
*P3 corrected wrong Expression.php due to rebase interactive problem
*P4 corrected missed correction of P3
*P5 rebased to master
*P6 "public static function"
Change-Id: I02ee0dba0d9178d2cb24bcc95bddd87adff3c714