[l10n] Swedish update
rawspeed: proper Samsung NX300 (and family) cropbox

Samsung has a weird thing going on where the center of the
sensor isn't the center of the image when processing a RAW.

So let's take the largest possible 3:2 cropbox.

This has been tested with the NX300, and also applied to all
Samsung NX camera's with a 2.5 gen sensor.
wb_presets: Samsung NX200 family copy
dngmeta: add some tips
Fix typos in messages of dngmeta.sh

This is purely cosmetic.
quick fix for #9949

this prevents a segmentation violation in the sharpen module for small images.
for #9949 this is only a fix of a symptom. the underlying root cause of that bug is
in the clipping module which does not take care that the clipping area needs to
lie within the image frame and should not have a width/height of zero
basecurve tool: fix PPM header reading code for PPMs generated by recent imagemagick
basecurve tool: optimize a bit making the 8bit/16bit to float only once
basecurve tool: rename some vars
basecurve tool: tentatively support orientation in helper script
basecurve tool: update README
basecurve tool: massive refactor of the helper script

- refactored the helper script. It is now also usefull for non
  Nikon/Canon raw files as long as it given the JPEG file as
  argument too.
- added support for the -s option in the helper script as well
- updated accordingly the README file
Merge pull request #562 from edgomez/dt_curve_tool_fix

basecurve tool: fixes and improvements