pushy.client.AutoImporter can outlive Client

[Andrew Wilkins]

AutoImporter objects do not hold reference to their owning Client, and so may outlive them. This is evident when you try to do something like:
    pushy.connect("local:").modules.os.getpid()
Currently you will get an AttributeError, because the client will have been dereferenced and closed before the getattr on the modules object completes.

[Andrew Wilkins (axwalk)]

This is a simple matter of adding the parent Client to the child object, to preserve its lifetime.