    - Drop from build-deps: openbabel, r-base-core (are in universe)
    - Keep in build-deps: libgmm-dev, libsbigudrv-dev, python-kde4-dev,
      python-qt4-dev, sip4, libindi-dev
    - kdeedu doesn't depend on kiten and blinken
    - cantor-backend-sage doesn't recommend sagemath
    - kstars doesn't suggest indi
    - kstars recommends xplanet
    - Keep python marble bindings and set -DEXPERIMENTAL_PYTHON_BINDINGS=TRUE
      in debian/rules
    - Don't build cantor-backend-r as we don't have the right build-depends
    - Parley recommends python-kde4, krossruby and libkde4-ruby
