Darktable 2.6.0

What's new in this version:

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:
- Fix the color pickers behavior in all modules
- Fix liquify tools switching
- Many more bugs got fixed

Lua:
- No changes

Changed Dependencies:
- CMake 3.4 is now required
- In order to compile darktable you now need at least gcc-5.0+/clang-3.9+
- Minimal clang version was bumped from 3.4+ to 3.9+
- Packagers are advised to pass -DRAWSPEED_ENABLE_LTO=ON to CMake to enable partial LTO

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

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