Change VTK  b-d to libvtk6-dev | libvtk5-qt4-dev

libvtk5-qt4-dev depends on libvtk5-dev.
Refresh nd-backport.patch
Add backport patch for Ubuntu trusty

With older libvtk6-dev, libpython-2.7.dev and libqt4-opengl-dev are
not a dependency
Release to unstable