+* ApiPageSet can now be used in any action to process titles/pageids/revids or any generator.
+* BREAKING CHANGE: ApiPageSet constructor now has two params instead of three, with only the
+ first one keeping its meaning. ApiPageSet is now derived from ApiBase.
+* BREAKING CHANGE: ApiQuery::newGenerator() and executeGeneratorModule() were deleted.
+* ApiQueryGeneratorBase::setGeneratorMode() now requires a pageset param.
+* $wgAPIGeneratorModules is now obsolete and will be ignored.
+* Added flags ApiResult::OVERRIDE and ADD_ON_TOP to setElement() and addValue()