modify debian/$foo for  qt5
new build dependencies
  - libqt4-dev (>= 4.8.0)
  - libqtxdg0-dev (>= 0.6.99)
  + qttools5-dev-tools (>= 5.3.0)
  + quilt
git - get sources from github
simpler maintainance and get-orig-source rules
added missed dependency qttools5-dev
simplify Qt switching
conditional debian rules
libegl1-mesa-dev is a workaround for
  https://bugreports.qt-project.org/browse/QTBUG-39859
make get-orig-source more verbose
short description in debian/control fixed
fix dependency to libqt5xdg0
qt5 build
move packaging to qt5
Merge remote-tracking branch 'origin/qt5'

Conflicts:
	debian/changelog
	debian/compat
	debian/control
	debian/copyright
	debian/docs
	debian/liblxqtmount0.install
	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/liblxqtmount0-dev.install
	qt4/debian/liblxqtmount0.install
	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/liblxqtmount-qt5-0.install
	qt5/debian/rules
	qt5/debian/source/format
	qt5/debian/source/options