Updated mediawiki/extensions
Project: mediawiki/extensions/EducationProgram  787602b67f442160d65729fd694a8d8ba17407e4

Add comments to clarify the structure of the extension.

Add inline comments to document how the extension works and where
more information about the techniques and conventions it uses can
be found, so that the code will be more accessible to novice
developers.

Change-Id: I089adeb8230ebb9b43f63011015ee214b775ee4e