Some format changes and repaired links

No new data, but I found some seriously broken links when people are included in more than one subsite. Some (maybe all) of those have been corrected. I have also started the process of converting the external pdf documents into html so they open faster and do not require Adobe Reader.   Biographies of Robert Broder and Roswell Graves were the test of this idea.  They are now online on the Broder and Striker/Graves sites.