Merge pull request #2 from darktable-org/master

aggiornamento
Merge remote-tracking branch 'upstream/master'
Merge pull request #528 from MRIG/master

Updated Dutch translation
Updated Danish translation
Merge pull request #530 from pryds/master

Updated Danish translation
Convert gpx and colormapping defines to enum
[l10n] Swedish update
colorlabels: make toggling of labels within selected images behave in a more intuitive way
Update French translation.
OSX packaging: update buidling instructions
OSX packaging: support upcoming macports release (2.3)

which promises correct implementation of macosx_deployment_target
Italian translation updated
Merge pull request #532 from bartokk/master

Italian translation updated
Drop iop anlfyeni (dead code, not even being compiled)
Drop iop shrecovery (dead code, not even being compiled)
Remove stale lines about long removed modules
prevent negative focus distance when reading Olympus exifs; a quick fix for #9895

there is still a bit of vulnerability in our code as it decides on availability
of exif data (exif_inited) based on some ad-hoc checks which might fail
lua : add float-typed preferences
Updated Dutch translation