Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  6b1e7cb3bd7d7e3e9547c7a13f785531d80cb50e
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Some code refactoring to reduce ugliness

* Pagers are now handled by message tables
* Need to pass more data from Special:Translate to message tables
  via TranslateTask, dropped TaskOptions
* Optional "works" now in tux, though not with ajax loader

Change-Id: I5a168a23eb1e244fc6c3143d68b6f0df933e705f