Customizable messages.

Takes a stab at #59.

Via the `config.yml`, this allows you to set messages for the restarting/stopping of proxy, and losing connection to the proxy. How I did this may not be the best approach (Javascript developer here!), so I'm open to suggestions on a better way.

As well, I updated the pom file for the config module so it builds with the rest of the modules. Not sure if this is necessary, but the version was out of date on it, so I went ahead and updated that.