- add a tool script to convert past history into weaves
this is not quite finished yet but does pretty well. we still need to upgrade the inventories as we go to make them store file revision_ids, so that we can get the right file back out of the weave.
the results compare quite well: the history of bzr up to this point is 25688kB in the full-text store, gzipped, and 3676kB in the weave store, and 1460kB in the weave store gzipped. so about 20x compression before gzip. a full working directory is 3084kB.
using this we can get accurate fast annotations of all past versions, though you do need to map the weave version numbers back to revisions by hand for the moment.