Release v0.2.0

• systemd notify.
• intro daemon command.
• fix two slight issues.

Release v0.2.0-rc1

• support multiple endpoints with same type.
• new gossip engine.
• fix issues.

Release v0.1.2

• fix some issues.
• debug mode.
• optional linux multiqueue tuntap support.
• increase packet forwarding concurrency.

Pre-release v0.1.1

• Layer-2/Layer-3 overlay supported.
• Simple TCP backend with optional encryption.
• Simple multiple networks with different backends.