about ready for an alpha release

Made 2 fixes:

1. In WDB, items (get iterator) now works across puts by recreating its curser when necessary

2. In TKS, destroyProperty now handles document properties.

I've also changed blksize from 8K to 16K. Updates run a bit slower, but queries run faster. This means that both queries and updates run as good or better than the old TKS. (In the case of updates, much better!)

Things just seem to work, but it needs banging on. Guess that means its going to be an alpha release.

Bill