Keep hosts up-to-date with docker-api

kamaze-docker_hosts is based on top of docker-api. It provides a CLI, through docker-hosts executable, to manipulate the operating system's host files. watch command will keep hosts file updated according to docker network changes.

In the future, cli will be separated from the core library.

Configuration

cli uses the core config files, unless /etc/docker-hosts config directory is present with expected files. Config directory can also be given from the cli option -c or --config.

Config can be displayed (after overlaying) with the config command, rendered with JSON notation.