Add es
Merge branch 'master' of https://github.com/darktable-org/darktable
Made lensfun lookups for one lens really unique.  Fixes bug #9662.
Add keywords, as recommended here:

 http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s05.html,
 http://bugs.debian.org/693918, and
 https://wiki.gnome.org/Initiatives/GnomeGoals/DesktopFileKeywords
Proper english. 'allows one to', not 'allows to'
Keywords value MUST end with a semicolon
gradientsliders: use NAN as value to disable display of color picker value

this allows better handling of out-of-bound values - those are clamped to
the gradient slider range but still a marker is displayed in the slider
colorin: add option to normalize Lab values to real, ie. non-virtual colors

depending on the color matrix belonging to a camera our current code may deliver
"virtual" Lab colors, e.g. pixels with negative L and high a/b values. while this
liberal handling of out-of-bound colors most frequently delivers good results, in
some cases our modules may produce serious artifacts. typically you find this in
photos showing saturated blue light sources (tell: stage photography) and when using
certain modules like "levels". the new code offers an option to normalize colors,
i.e. restrict Lab to really existing colors. we achieve this by transforming
camera RGB to linear RGB, clamping, and finally transforming to Lab. currently
if the normalize option is activated all colorin processing is done by lcms2
which leads to a significant slow-down.
colorin: extended version: fix shortcomings; enable selection of clipping profiles; implement SSE and OpenCL codepaths
colorin: some code cleanup
chmod -x da.po
Update French translation.
Updated Dutch translation
Merge pull request #447 from MRIG/master

Updated Dutch translation
Updated Dutch translation
Merge pull request #448 from MRIG/master

Updated Dutch translation
initial implementation of slideshow view
slideshow: coarse view skeleton
slideshow: create background thread to process image buffer.
slideshow: fix crash.