Updated mediawiki/extensions
Project: mediawiki/extensions/GuidedTour  03f971340effd60b558797c71656a3fd7919bae3

Cleanup jsduck documentation and commenting:

* Fix jsduck config to document mw.guidedTour.internal correctly
* Move comments to before docblock, which jsduck requires
* Add text for licenses we're using
* Import MetaTags.rb and external.js from VisualEditor under MIT

Change-Id: I46e103c1a559200deea284245dc96bbe17600994