Italian translation updated

Added translation for the local cache support.
Merge pull request #261 from bartokk/master

Italian translation updated
Merge pull request #262 from pryds/master

Updated Danish translation
Fix issue with duplicate key accel.

A cut&paste bug introduce for the local cache support.
Resolve resource leak in dt_camctl_import
Merge pull request #263 from mlq/master

Resolve resource leak in dt_camctl_import
masks: performance optimization (speed and memory footprint)
Merge branch 'master' of ssh://github.com/darktable-org/darktable
Fixed some strings that were not all lower-case.
[l10n] Swedish update: 8 new strings regarding local copies
Merge remote-tracking branch 'upstream/master'