Juju 2.0 and local charm deployment

[Ian Booth]

Hey Marco

> 
> I'm a +1
> 
> How will bundles work which reference local charms? Will this work as
> expected where nova-compute is a directory at the same level as a bundle
> file?
> 
> ```
> series: trusty
> services:
>   nova-compute:
>     charm: ./nova-compute
>     num_units: 2
> ```
> 

The above will work but not until a tweak is made to bundle deployment to
interpret a path on disk rather than a url. It's a small change. This would be
done as part of the work to remove the local repo support.