reviewed the text. Fixed typos. Shortened. Added very rough preliminary abstract.

git-svn-id: http://es-lab.googlecode.com/svn/trunk@746 aeea10e6-ec39-11de-83d8-6d5adf01d787
updated with bill's bibtex entries


git-svn-id: http://es-lab.googlecode.com/svn/trunk@747 aeea10e6-ec39-11de-83d8-6d5adf01d787
re-aligned minipages

git-svn-id: http://es-lab.googlecode.com/svn/trunk@748 aeea10e6-ec39-11de-83d8-6d5adf01d787