Release Notes: The build system has been revised. The documentation is now based on qdoc3. QxtConfig.cmake. QxtModelSerializer has been added. The obsolete QxtSemaphore has been removed. QxtJSON has been added. Rich text support has been added to QxtItemDelegate. obsolete QxtTabWidget::TabMovementMode, QxtTabBar, and QxtDockWidget have been removed. QxtConfigDialog and QxtConfigWidget have been revised. QxtWindowSystem::idleTime() has been enhanced to resolve libXss at run-time QxtCrumbView::crumbDelegate(), QxtFilterDialog, and QxtLookupLineEdit have been added.