Version 0.6.0

Changes

• Add shell completion support for the CLI
• Add support for wormhole URIs
  • [cli] The CLI will show a QR code (even if no app can probably read it currently) and a link
  • [lib] See magic_wormhole::uri::WormholeTransferUri
• [lib][breaking] File transfer functions do not take a url::Url for the relay server anymore, but a Vec<magic_wormhole::transit::RelayHint>
  • For migration, look at magic_wormhole::transit::RelayHint::from_urls
• Fix broken port forwarding
• Fix directory transfer
• Smaller bugfixes