Juju 2.0 and local charm deployment

[Ian Booth]

> 
> Does this mean it won't be possible to deploy old single-series
> charms with Juju without modifying metadata.yaml to add the supported
> series?
> 

You can use the --series argument

$ juju deploy ./trusty/mysql --series trusty

We could look at pulling the series out of the path if it's an old single-series
charm without series defined in metadata. Would that be an approach we'd be
willing to adopt?