Ubuntu needs some additional packages

[zoidberg8e]

In ubuntu the configure step fails with
No package 'xrandr' found
My solution was to install the following packages, as mentioned here: openMVG/openMVG#85
sudo apt-get install xorg-dev libglu1-mesa-dev

Maybe you could add this to the readme.

Thank you

[phillipberndt]

Thanks, added (plus two other dependencies).