Allow the factorio_directory specified in the slave config to contain
multiple Factorio installs and add factior.version instance option to
select which install to use for the given instance.
Break out the server process management to a new FactorioServer class in
lib/factorio. This class takes responsibility for managing a factorio
server, communicating with it and handling the stopping of it. It also
replaces the previous effort to do this in lib/factorioServer.
This change also updates the version of rcon-client, and since the
author of it has updated it to use UTF-8 the fork is no longer
necessary. It also removes the messageInterface implementation
in favor of just calling the rcon-client library directly since
this has rate limiting logic built in.
The lib/factorio library is intended to abstract all the interfacing
that happens with Factorio.
Hornwitser