This patch introduces a Makefile to make it easier to build with version
information, and run all the tests together.
It's just for convenience, plain go commands continue to work just fine.
This patch changes chasquid-util's subcommands and parameters to
(hopefully) make them more user friendly and intuitive by default.
The changes include defaulting the configuration to /etc/chasquid, and
using full addresses as usernames.
It also adds some shell tests to cover most of the functionality.
This patch adds a "chasquid-userdb" command line tool to check and add users
to chasquid's userdb files.
It's not pretty or very friendly, as it's meant to be used for testing for
now.
