Italian translation updated
Merge pull request #730 from bartokk/master

Italian translation updated
OSX packaging: support signing the resulting application bundle
usermanual: a few remarks on output profiles as suggested by pmjdebruin
Updated Catalan translation
Merge pull request #735 from josepvm/master

Updated Catalan translation (61% translation done)
wb_presets: LEICA D-LUX 6 (thanks to grigorios skaltsas)
imageio: only load Panasonic derived Leica's via RawSpeed
CMake: geotagging: we already require glib-2.30
Merge branch 'master' of https://github.com/darktable-org/darktable
Proofreading of the French usermanual till chapter Chambre noire (not included)