v0.3.9

Note: 0.3.8 was never released at pip / github releases.

• numerous improvements from the 0.4.0 branch #29
• support for creating a server from template
  https://www.upcloud.com/api/8-servers/#creating-from-a-template

manager.create_server(
    Server(
        core_number=2,
        memory_amount=1024,
        hostname='my.example.com',
        zone=ZONE.Frankfurt,
        storage_devices=[
            Storage(uuid=UUID, size=10),  # we also support Storage(storage=UUID, size=10)
        ],
    )
)