This update for darktable fixes the following issues:

Darktable was updated to 2.6.2:

- New Features

  - Update colorbalance french translation

- Bugfixes
- Camera support, compared to 2.6.1

    - Base Support

      - DSC-RX100M6
      - Phase One P30 (fixed)
      - Olympus OM-D E-M10 (enhanced)
      - Nikon D7500 (enhanced)

    - White Balance Presets

      - Nikon D500
      - Olympus E-PL8

    - Noise Profiles

      - Sony SLT-A35
      - Nikon Z6

- updated translations: Catalan, Czech, Dutch, Finnish, French,
  German, Norwegian bokmål, Polish, Russian, Slovenian, Spanish

- Updated pdf manuals from 2.6.1 tag: comes in english, german and
  italian
- actually install all pdf documentation

Version update to 2.6.1:

  - New Features

    - export module to piwigo
    - color balance enhancements
    - color contrast enhancements
    - filmic enhancements (better auto-tuner)
    - add contextual help for filmic module
    - middle-click can be used to open the presets menu (this is
      consistent with the fact that middle-click can be used to
      create a new instance from a preset)
    - again, better CSS customization for lighttable, filmstrip and
      duplicates module
    - presets can now be imported/exported
    - all zoom levels can now be reached with a ctrl-scroll
    - the slideshow view will adjust automatically when darktable
      window is resized
    - add support for tiff CIELAB/ICCLAB 8/16 bits
    - add hierarchical view for styles (separated with |)
    - forms opacity is displayed in hint messages
    - add a color picker in the watermark module

  - Bugfixes
  - Camera support, compared to 2.6.0

    - Base Support

      - DSC-RX100M6
      - Phase One P30 (fixed)
      - Olympus OM-D E-M10 (enhanced)
      - Nikon D7500 (enhanced)

    - White Balance Presets

      - Nikon D500
      - Olympus E-PL8

    - Noise Profiles

      - Sony SLT-A35
      - Nikon Z6

  - Translations

    - Catalan Czech, Dutch, Finnish, French, German, Norwegian
      bokmål, Polish, Russian, Slovenian, Spanish

Noise tools need ghostscript for pdf handling

Darktable updated to 2.6.0:

  - The Big Ones

    - new module retouch allowing changes based on image frequency
      layers
    - new module filmic which can replace the base curve and
      shadows and highlights
    - new module to handle duplicates in the darkroom with
      possibility to add a title, create standard or virgin
      duplicate, delete duplicate and quickly compare with a
      duplicate
    - new logarithm controls for the tone-curve
    - new mode for the unbreak profile module
    - add mask preview to adjust size, hardness before placing them
    - make it possible to change the cropped area in the
      perspective correction module
    - the mask blur has been complemented with a guided-filter to
      fine tune it (this works on RGB and Lab color space).
    - color balance module has two new modes based on ProPhotoRGB
      and HSL
    - Experimental support for PPC64le architecture (OpenCL support
      needs to be disabled, `-DUSE_OPENCL=OFF`)

  - New Features And Changes

    - search from the map view is now fixed
    - visual rework of the lighttable (color label, image kind,
      local copy)
    - an option make it possible to display some image information
      directly on the thumb
    - add optional scrollbars on lighttable, or lighttable and
      darkroom
    - allow each masks of the clone module to have the opacity
      adjusted
    - lightroom import module supports the creator, rights, title,
      description and publisher information.
    - enhance TurboPrint support by displaying the dialogue with
      all possible options (print cancellation will be fixed in
      TurboPrint 2.47)
    - new sort filter based on the image's aspect
    - new sort filter based on the image's shutter speed
    - new sort filter based on the image's group
    - new sort filter based on a personalized sorting order
      (drag&drop on the lighttable view)
    - collection based on the local copy status
    - group image number displayed on the collection module
    - new zoom level at 50%; 400%, 800% and 1600%
    - better support for monochrome RAW
    - add contextual help pointing to the darktable's manual
    - better copy/paste support for multiple instances
    - add support for renaming the module instances
    - add frequency based adjustment for the RAW denoise module
    - add frequency based adjustment for the denoise profile module
    - all widgets should be themable via CSS now
    - add support for configuring the modules layout
    - different way to select hierarchical tags in the collection
      module (only the actual parent tag, all children or the
      parent and children)
    - better handling of grouped images by allowing setting stars,
      color label for the whole group.
    - make it possible to apply a preset to a new module instance
      using the middle click
    - new script to migrate collection from Capture One Pro

  - Bug fixes
  - RawSpeed changes

    - GoPro '.GPR' raws are now supported via new, fast 'VC-5'
      parallel decompressor
    - Panasonic's new raw compression ('.RW2', GH5s, G9 cameras) is
      now supported via new fast, parallel 'Panasonic V5'
      decompressor
    - Panasonic's old (also '.RW2') raw decompressor got rewritten,
      re-parallelized
    - Phase One ('.IIQ') decompressor got parallelized
    - Nikon NEF 'lossy after split' raw support was recovered
    - Phase One ('.IIQ') Quadrant Correction is now supported
    - Olympus High-Res (uncompressed) raw support
    - Lot's and lot's and lot's of maintenance, sanitization,
      cleanups, small rewrites/refactoring.
    - NOTE: Canon '.CR3' raws are *NOT* supported as of yet.

  - Camera support, compared to 2.4.0

    - Base Support

      - Canon EOS 1500D
      - Canon EOS 2000D
      - Canon EOS Rebel T7
      - Canon EOS 3000D
      - Canon EOS 4000D
      - Canon EOS Rebel T100
      - Canon EOS 5D Mark IV (sRaw1, sRaw2)
      - Canon EOS 5DS (sRaw1, sRaw2)
      - Canon EOS 5DS R (sRaw1, sRaw2)
      - Canon PowerShot G1 X Mark III
      - Fujifilm X-A5
      - Fujifilm X-H1 (compressed)
      - Fujifilm X-T100
      - Fujifilm X-T3 (compressed)
      - GoPro FUSION (dng)
      - GoPro HERO5 Black (dng)
      - GoPro HERO6 Black (dng)
      - GoPro HERO7 Black (dng)
      - Hasselblad CFV-50
      - Hasselblad H5D-40
      - Hasselblad H5D-50c
      - Kodak DCS Pro 14nx
      - Kodak DCS520C
      - Kodak DCS760C
      - Kodak EOS DCS 3
      - Nikon COOLPIX P1000 (12bit-uncompressed)
      - Nikon D2Xs (12bit-compressed, 12bit-uncompressed)
      - Nikon D3500 (12bit-compressed)
      - Nikon Z 6 (except uncompressed raws)
      - Nikon Z 7 (except 14-bit uncompressed raw)
      - Olympus E-PL8
      - Olympus E-PL9
      - Olympus SH-2
      - Panasonic DC-FZ80 (4:3)
      - Panasonic DC-G9 (4:3)
      - Panasonic DC-GF9 (4:3)
      - Panasonic DC-GX800 (4:3)
      - Panasonic DC-GX850 (4:3)
      - Panasonic DC-GH5S (4:3, 3:2, 16:9, 1:1)
      - Panasonic DC-GX9 (4:3)
      - Panasonic DC-LX100M2 (4:3, 1:1, 16:9, 3:2)
      - Panasonic DC-TZ200 (3:2)
      - Panasonic DC-TZ202 (3:2)
      - Panasonic DMC-FZ2000 (3:2)
      - Panasonic DMC-FZ2500 (3:2)
      - Panasonic DMC-FZ35 (3:2, 16:9)
      - Panasonic DMC-FZ38 (3:2, 16:9)
      - Panasonic DMC-GX7MK2 (4:3)
      - Panasonic DMC-ZS100 (3:2)
      - Paralenz Dive Camera (chdk)
      - Pentax 645Z
      - Pentax K-1 Mark II
      - Pentax KP
      - Phase One P65+
      - Sjcam SJ6 LEGEND (chdk-b, chdk-c)
      - Sony DSC-HX99
      - Sony DSC-RX0
      - Sony DSC-RX100M5A
      - Sony DSC-RX10M4
      - Sony DSC-RX1RM2
      - Sony ILCE-7M3

    - White Balance Presets

      - Canon EOS M100
      - Fujifilm X-T3
      - Leaf Credo 40
      - Nikon D3400
      - Nikon D5600
      - Nikon D7500
      - Nikon D850
      - Nikon Z 6
      - Olympus E-M10 Mark III
      - Olympus E-M1MarkII
      - Panasonic DC-G9
      - Panasonic DC-GX9
      - Panasonic DMC-FZ300
      - Sony DSC-RX0
      - Sony DSC-RX100M5
      - Sony DSC-RX100M5A
      - Sony DSC-RX10M3
      - Sony DSC-RX10M4
      - Sony DSC-RX1RM2
      - Sony ILCE-6500
      - Sony ILCE-7M3
      - Sony ILCE-7RM3

    - Noise Profiles

      - Canon EOS 200D
      - Canon EOS Kiss X9
      - Canon EOS Rebel SL2
      - Canon EOS 750D
      - Canon EOS Kiss X8i
      - Canon EOS Rebel T6i
      - Canon EOS 760D
      - Canon EOS 8000D
      - Canon EOS Rebel T6s
      - Canon EOS 77D
      - Canon EOS 9000D
      - Canon EOS 800D
      - Canon EOS Kiss X9i
      - Canon EOS Rebel T7i
      - Canon EOS M100
      - Canon EOS M6
      - Canon PowerShot G1 X Mark II
      - Canon PowerShot G1 X Mark III
      - Canon PowerShot G9 X
      - Fujifilm X-A5
      - Fujifilm X-E3
      - Fujifilm X-T3
      - Fujifilm X100F
      - Nikon 1 AW1
      - Nikon 1 J3
      - Nikon COOLPIX B700
      - Nikon D5600
      - Nikon D7500
      - Nikon D850
      - Olympus E-M10 Mark III
      - Olympus TG-5
      - Panasonic DC-G9
      - Panasonic DC-GX9
      - Panasonic DMC-FZ35
      - Panasonic DMC-FZ38
      - Panasonic DMC-GF6
      - Panasonic DMC-LX10
      - Panasonic DMC-LX15
      - Panasonic DMC-LX9
      - Panasonic DMC-TZ70
      - Panasonic DMC-TZ71
      - Panasonic DMC-ZS50
      - Pentax K-01
      - Pentax KP
      - Samsung NX1
      - Sony DSC-RX100M4
      - Sony DSC-RX10M3
      - Sony ILCE-7M3

  - Translations
    - Afrikaans, Albanian, Chinese, Czech, Dutch, Finnish, French,
      Galician, German, Hebrew, Hungarian, Italian, Japanese,
      Nepal, Norwegian Bokmål, Polish, Portuguese, Romanian,
      Russian, Slovenian, Thai