Log Message:
Add luminance-hdr 2.4.0

Luminance HDR is a graphical user interface (based on the Qt5 toolkit)
that provides a workflow for HDR imaging.

Supported HDR formats:
* OpenEXR (extension: exr)
* Radiance RGBE (extension: hdr)
* Tiff formats: 16bit, 32bit (float) and LogLuv (extension: tiff)
* Raw image formats (extension: various)
* PFS native format (extension: pfs)

Supported LDR formats:
* JPEG, PNG, PPM, PBM, TIFF, FITS