removed; no longer used
updated release date
removed traces of now-unnecessary fedora-service
removing old copies of policy files from src/xml/xacml-policies
added link to SIPCreator.
added description of compareDatastreamChecksum and expanded some sections.
xml-apis.jar and xercesImpl.jar are now part of the Fedora web-app
moved source installation to a separate section
diagram fix.
added more links to pages. Minor reorgs and edits.