v0.2.0: bugfixes and autoygg-server lease expiration

autoygg-client: bugfixes: config peer detection on non-openwrt platforms now works. change: blackhole routes are now no longer added.

autoygg-server: bugfix: on shutdown, make sure to tear down the default route in the mesh routing table if one was added on startup. refactor: make the config names of the firewall commands consistent with all other configurable commands. feature: add lease expiration.