[CIG-SHORT] Updated PyLith development priorities

[Brad Aagaard]

Per Mark Simons's suggestion, I created a diagram of features to be 
added to PyLith in the next year or so that includes their dependencies. 
I have also estimated a timeline for releases along with the features 
for each release. I have adjusted the priorities and features in the 
release based on community feedback. The diagram with accompanying 
description and explanation is posted at
http://www.geodynamics.org/cig/workinggroups/short/workarea/planning/priorities2008/pylith/

Additional comments are welcome.

Cheers,
Brad