Italian translation updated
Merge pull request #574 from bartokk/master

Italian translation updated
IOPs: cleanup histogram after switching images
Merge pull request #580 from LebedevRI/fix-noncurrent-histogram

IOPs: cleanup histogram after switching images
dt_histogram_worker: plain malloc is fine here
Deflicker: mode switching: gui complete
DEFLICKER_MODE_SOURCEFILE is working?
Deflicker "Automatic" is working?
IOP Exposure: histogram - when mode is automatic, change target level
Make sure deflicker will work only for raws (at least for now)