New port graphics/pho (version 0.9.1)

This is a new port of pho. Pho is a lightweight program for
viewing large numbers of images quickly, rotating or deleting
some, and making notes about what to do with each image --
for instance, for going through hundreds of images after
uploading them from a digital camera.

It is similar to xv but with some additional functionality
and without some of its annoyances.

PR: ports/50794
Submitted by: Roland Jesse <roland.jesse@gmx.net>