GP-4914: second pass from review

GP-4914: one more...
GP-4914: post-review, factor service down
GP-4914: post-review, factor service down
GP-4914: various issues
GP-4914: bounds errors
GP-4914: most tests ok; unwind info in service
GP-4914: fixing tests
GP-4914: more fixes
GP-4914: beta
GP-4914: sp adds, working
GP-4914: sp
GP-4914: temp mess
GP-4914: oops re buildXml
GP-4914: using base logic to pull regs
GP-4915: solution for frames w/o pgm & frames w/o ofReturn
GP-4914: tests passing (well, sort of)
GP-4914: should return the right frame
GP-4914: test checks
GP-4914: first pass
GP-4914: better layeringGP-4914: minor