First cut ListNetworks
Merge branch 'master' into listnetworks-maas
Merge branch 'master' into listnetworks-maas
Skeleton test for ListNetworks
Updated comment and logging
Add comments to test
Merge pull request #1130 from voidspace/listnetworks-maas

ListNetworks maas

An implementation of Envrion.ListNetworks for the MaaS provider. It fetches the available networks for a given instance.