API change: juju subcommands will wait for connection to Zookeeper

[Clint Byrum]

Excerpts from Jim Baker's message of Wed Nov 16 14:35:06 -0800 2011:
> A forthcoming branch removes the need to wait before issuing juju
> subcommands commands following a bootstrap. This is tracked by this bug:
> https://bugs.launchpad.net/juju/+bug/849071
> 
> That is, it should possible to do the following:
> 
> $ juju bootstrap && juju status && juju whatever-else-i-want-to-do
> 
> and not see an error.
> 

+1! This is really quite a welcome change.