Anytime realization vs. packing/unpacking

I've implemented a more conventional two-stage packing/unpacking approach to realization, for direct comparison to the anytime approach. Initial experiments indicate that the anytime approach generally works better, though more comprehensive experiments are planned soon to verify these results. A nice feature of the packing approach though is that you can now turn unpacking off (in tccg) and view all possible realizations in the generation forest, pretty-printed as a regexp-style string. (NB: some effort is taken to "compact" the gen forest, but it's hard to eliminate all equivalent derivations without completely unpacking the structure.)

-Mike