amolenaar/gaphor — pull request #40 by egroeper (2012-11-28 12:01:17+00:00)
Title: Aligment fix and improvement

Hello,
I first fixed the align_center function. After that I changed alignment functions to use the last selected (focused) item as base for calculating the new positions.
I would prefer using the first selected item, but that seems to be a lot more complicated.

By using the last selected item as base of the alignment, the user gains a lot more control of alignment.