Updated mediawiki/extensions
Project: mediawiki/extensions/BayesianFilter  965c4ab1d3055bf79153dfec42759aca25d588d5

Consistency tweaks in preparation for adding extension to translatewiki.net

* Prefix message keys with extension name to avoid key conflicts with core and/ore other extensions
* Add extension description message
* Add message documentation

Change-Id: I3518aa6e59448842ffeffffca98efbe5e3c21e54