Fixes #100.
The file with the addresses is in the repo, so people don't have to
regenerate it, but the build system is able to do it.

this module is superseded by http module, removing

forks are connected with IPC pipes to process
group leader and can execute expressions on its
behalf. so running commands over all workers
is easy now:

> hostname() -- single
localhost

> map 'hostname()' -- all
localhost
localhost
localhost

After=network.target is still needed because we don't have IP_FREEBIND.

daemon can accept existing fds on command line,
thus supporting process managers like circus or
upstart. a tiny supervisor script is attached

the utility supports most of the 'unbound-host'
functionality except PTR records

this is a boilerplate for a CLI utility to resolve
names and execute script on query response
in another words, "a jq for resolver answers"

this is a scaffolding for alternative tools like
'host' or a plug-in part for scripting around it.

it basically starts a kresd instance, but doesn't
bind to any interface or read configuration,
then a query + callback is sent to kresd standard
input, and it quits after the execution

this is not going to be backwards compatible change, but it will be the first tagged libknot release sufficient for resolver

thanks @darix!
fixes #21,#22

this should help packaging the project to other platforms

thanks @darix!

thanks to johan ihren