changes for qt5
move to qt5
Merge remote-tracking branch 'origin/qt5'

Conflicts:
	.gitignore
	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