switch to qt5
change build dependencies
make get-orig-source more verbose
qt5
move to qt5
Merge remote-tracking branch 'origin/qt5'

Conflicts:
	debian/changelog
	debian/compat
	debian/control
	debian/copyright
	debian/docs
	debian/rules
	debian/source/format
	debian/source/options
	qt4/debian/changelog
	qt4/debian/compat
	qt4/debian/control
	qt4/debian/copyright
	qt4/debian/docs
	qt4/debian/rules
	qt4/debian/source/format
	qt4/debian/source/options
	qt5/debian/changelog
	qt5/debian/compat
	qt5/debian/control
	qt5/debian/copyright
	qt5/debian/docs
	qt5/debian/rules
	qt5/debian/source/format
	qt5/debian/source/options