Remove ".wmf" version of index-examples screenshot
Recreate index-examples screenshot (previous version was slightly blurry)
Revise webapp section
Add geometry package and set page margins
Reformat XML examples section: Wrapping individual examples in figure
environments caused them to float into the regest title patterns
section
Reformat extraction paragraph for bibliography
Adjust image sizes in "Other Parts of the Book" chapter
Improve wording of some sentences in intro section