QtIFW

Merge branch 'master' into refactor

Conflicts:
	installerbuilder/libinstaller/elevatedexecuteoperation.cpp
	installerbuilder/libinstaller/installiconsoperation.cpp
	installerbuilder/libinstaller/libinstaller.pro
	installerbuilder/libinstaller/qinstaller.cpp
	installerbuilder/libinstaller/registertoolchainoperation.cpp
	installerbuilder/libinstaller/selfrestartoperation.cpp