Log Message:
Update to 0.66:

version: 0.66
date:    Thu Sep 27 01:37:16 PDT 2007
changes:
- Blessed code refs with LoadCode=0 still get blessed. rafl++

---
version: 0.65
date:    Thu Jun 21 17:37:32 PDT 2007
changes:
- \z is really \0
- Speed up regexp loading. audreyt++

---
version: 0.64
date:    Thu Jun 21 14:31:20 PDT 2007
changes:
- Better support for loading regexps. audreyt++

---
version: 0.63
date:    Wed Jun 20 16:03:22 PDT 2007
changes:
- Don't emit nodes blessed into '' in the new tag scheme, and improve semantics
  of loading such nodes.
- New support for dumping/loading regexps.