[PATCH 0 of 2] Adding bundle -r and fixing small problem

[Eric Hopper]

This patch fixes a small exception handling problem in bundle which would
cause bundle to act like everything was fine even if it ran out of space
while writing the bundle.

It also adds the -r option to bundle.  This will bundle only those changes
needed to reach the specified revision.

The changes can also be pulled from:

http://hg.omnifarious.org/~hopper/mercurial