Doxygen documentation update:
* Changed alls @addtogroup to @ingroup. @addtogroup adds the comment to the group description, but doesn't add the file, class, function, ... to the group like @ingroup does. See for example http://svn.wikimedia.org/doc/group__SpecialPage.html where it's impossible to see related files, classes, ... that should belong to that group.
* Added @file to file description, it seems that it should be explicitely decalred for file descriptions, otherwise doxygen will think that the comment document the first class, variabled, function, ... that is in that file.
* Removed some empty comments
* Removed some ?>
Added following groups:
* ExternalStorage
* JobQueue
* MaintenanceLanguage
One more thing: there are still a lot of warnings when generating the doc.
* Add @addtogroup tags to various classes, to try and group conceptually-related classes together.
* Add brief descriptions to various Special pages, thanks to Phil Boswell.
* Moving some docs to be right above the classes they represent, so that they are picked up.
* @link. You might think @link would surely mean "here comes a web URL" ... but @link is a valid command
in Doxygen, which means an entirely different kind of link (an internal link to somewhere, so that you can separate
documentation and implementation). The result is a mess, and the best solution I can see is to use "@see" instead of "@link".
* Warning: argument `nourl' of command @param is not found in the argument list of Linker::makeMediaLinkObj($title,$text='')
* Moving few class descriptions to right above classes, and/or formatting into Javadoc style.
* "@addtogroup Special Pages" --> "@addtogroup SpecialPage" so that all special pages have the same @addtogroup tag.
* @fixme --> @todo (must have missed these before)
* "@param $specialPage @see" remove the "@" in the "@see" to stop warning.
* @throws wants type, then a brief description, to stop warning.
This last one is for PHPdocumentor only, but it fixes something for PHPDocumentor, and should be neutral for Doxygen:
* WARNING in includes/api/ApiFormatYaml_spyc.php on line 860: docblock template never terminated with /**#@-*/
