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