refactor: rename badly named function
makeAddressReply handles both A and AAAA records
handle AAAA queries for external IPs

Closes #188.
Differentiate between failure cases in http_call

.. otherwise, no networking can look like no running container.
Better terminologicals for no-IP case
Better phrasing for http_call error messages
simplify
Merge branch 'squaremo-issue191'

Fixes #191.
Morkdonify code-like words
Add link to "Hello, Weave!" screencast
Merge pull request #196 from errordeveloper/master

Add quick start video to the README

(and minor markdown tweaks along for the ride)
change styling of host references in remainder of docs
Following #196.
make it work on non-BSD-ish systems

Fixes #199
tidying around --dns-search