FreeBSD Port of luminance-hdr updated

I finally managed to update graphics/luminance to 2.3.1. Thanks to lme@freebsd and pawel@freebsd for feedback and commit.

This is last version that runs with Qt4. As we recently got Qt5 into the ports I will try to update the port soon again. I also have some new ports coming and hope to get around to fixing/updating my other ones. Stay tuned.

I am making strong use of RedPorts now. In case you don’t know the service, I really recommend it.