* Moved wfViewPrevNext() to Language::viewPrevNext() so that it can be used in the...

* Moved wfViewPrevNext() to Language::viewPrevNext() so that it can be used in the context and not always relying on $wgLang
* modified the parameters order in Language::viewPrevNext() in comparaison of wfViewPrevNext() and changed it to require a Title object and extra parameter to be passed as array
* Use more modern methods to genrate i18n and HTML
* Removed wfNumLink(), not used anymore, only referenced in a comment in MetavidWiki extension
* Inlinised wfShowingResults(); I don't see any reason why only this message should get its own function
* Replaced all calls to wfViewPrevNext() and wfShowingResults() in core
* Simply use OutputPage::addWikiMsg() to display 'specialpage-empty' message
* Moved wfSpecialList() near wfViewPrevNext() in GlobalFunction.php