Many changes to add new features and fix bugs.  See CHANGES.txt for more details.

Major edits include:

        * Added code for field/array fast path methods.
        * Made shadow volatiles have weak refs back to objects, as with shadow
        locks.
        * Fixed weaf-ref problem in ArrayStateFactory.
        * Fixed retry bug in FastTrackTool CAS implementation
        * org.xml is no longer instrumented --- part of bootclasspath libs
        * Changed object string map to be weak to avoid keeping stuff around...
        * Added CAS updaters --- experimental, use at your own risk.
        * Added ThreadState extensions for Tools using inheritance
        * Deprecated shadow thread passing option -- faster w/out it.
        * Added warning about -values flag and old class files...
        * Updated some documentation / comments.