Merge pull request #2 from darktable-org/master

aggiornamento
Merge remote-tracking branch 'upstream/master'
masks: fix braindead bug that has caused an excessive number of nodes for brush strokes
masks: on deletion of brush nodes: remove complete shape if only one node is left
Silence calculator error messages

People didn't appreciate these:
error: T
error: R
error: U
error: E
exiv: parse FocusDistanceUpper and FocusDistanceLower (specific for Canon) (needs exiv2-0.25)
masks: some further improvements for brush node elimination
masks: give user control of the level of brush smoothing with a config parameter
Explicitly try to load live view frames as JPEG

There were cases where a generic GDKPixbufLoader wasn't able to
recognize the JPEGs as being JPEGs.
Updated Dutch translation
Merge pull request #527 from MRIG/master

Updated Dutch translation
Minor typo fix in French translation.
Updated Dutch translation
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.