Elizabeth Patitsas comments on python.html exercises
After conversation with Jon Udell, removing XML stuff from web chapter:
will use JSON for all examples instead.  This will free up space to talk
about other things (e.g., Google Fusion tables).
Command to display history graphically in Git
Merge branch 'master' of github.com:swcarpentry/website into book
Merge branch 'master' of github.com:gvwilson/website into book