[MERGE/RFC] partial delta generation

[Aaron Bentley]

Aaron Bentley has voted reject.
Status is now: Vetoed
Comment:
I really don't think this is the right way to go about this.  We should 
work on making RevisionTrees lazy instead, so that we have a consistent 
API for all tree types.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C4987D6B7.4050601%40internode.on.net%3E
Project: Bazaar