refclassfixup.py fixes up some class references.

refclassfixup.py fixes up some class references.
The places changed to add the live links are in
dataobject.tex datarepresentation.tex debugsectionrelationships.tex
generaldescription.tex  using refclassfixup.py to effect the
source changes.  Note that using label and hyperref
in the live* commands defined in dwarf5.tex result in
incorrect links in the pdf (not clear why) so we use
hyperlink and hypertarget instead for now.