color picker: minor code optimization
usermanual: the overlay feature
desktop: darker unity launcher background color
export: exporting to display color space is very silly indeed
Update French translation.
Updated Dutch translation
Merge pull request #545 from MRIG/master

Updated Dutch translation
Fix yet another segfault due to buffer overflow
One could cause this by `darktable --datadir `perl -e 'print "A"x5000'``
Fix yet another one segfault due to heap-buffer-overflow
One could cause this by `darktable --moduledir `perl -e 'print "A"x5000'``
Merge master branch to zh_CN translation branch
update chinese translation