Graphics.Text() doesn't vertically center multiline text properly

[Doug Blank]

Text(p, "Hello\nWorld").draw(window) doesn't properly vertically align text. See for example:

http://nbviewer.ipython.org/urls/bitbucket.org/ipre/calico/raw/master/notebooks/Python/GraphViz%20Dot.ipynb

in the Kennedy nodes. I think that is the problem.

[Doug Blank]

Commit fe85a5d fixes issue. Turns out to have been a number of problems.