[MERGE] Add a Branch.get_parent remote call for RemoteBranch.

[Robert Collins]

Yay. Or well, its better. But not round trip reductions :(.

-Rob
-------------- next part --------------
A non-text attachment was scrubbed...
Name: branch-roundtrips-4079.patch
Type: text/x-patch
Size: 13035 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20090305/39f5fde5/attachment-0001.bin 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20090305/39f5fde5/attachment-0001.pgp