Release v0.8.1.

This release adds some minor enhancements to help with testing, especially
BEP5 connectivity logging and a new test script to ping peers announcing
themselves at the different Ouinet swarms.

Features:

  - Report protocol version number in status API (`ouinet_protocol`).
  - New `ping-swarm` script to test the reachability of peers in Ouinet
    swarms.  The script is included in the Docker image along with other
    testing tools under the `utils` directory.

Enhancements:

  - With debugging on, log the actual peer (injector or bridge) used to reach
    an injector; also periodically report the number of injectors and bridges
    seen in their respective swarms (e.g. to detect blocking of BT traffic).

version.txt

-0.8.0
+0.8.1