v0.3.0-alpha.0

Notable changes since v0.2.0:

• [EXPERIMENTAL] QMP-like JSON API for exposing node ports (--api-socket) (#29)
• Support protecting 127.0.0.1 on the host (--disable-host-loopback) (#50, #63)
• Support specifying CIDR like 10.0.2.0/24(--cidr) (#62)