[rfc] bzr-colo into core

[Alexander Belchenko]

Martin Pool пишет:
> {summary}
> 
> Let's make bzr-colo the default model for bzr 3.0 in September.

I'm going to provide more feedback based on my experience with bzr-colo, 
but right now I have to note that in the current form bzr-colo has one 
very weak point: bzr-colo uses branch references (lightweight checkouts) 
and those references are *always* absolute paths. This fact creates a 
lot of problems when user want to rename/move the colo-workspace, or 
just push from one colo-workspace to another colo-workspace on the 
different machine via path aliases (e.g. networked disks in Windows).
There are several bug reports re this behavior.

I think this should be carefully revised to avoid real problems when it 
becomes the default user model.