[MERGE] Initial support for marking bugs as fixed using bzr

[John Arbash Meinel]

John Arbash Meinel has voted +1 (conditional).
Status is now: Semi-approved
Comment:
You need direct tests for SimpleBugTracker, and SimpleIntegerBugTracker.

And the documentation could be updated a bit.

pending acceptance of the basis patch

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C20070412211415.GD3524%40jameswestby.net%3E