2.4.1

This is a small release with the following changes:
* Added support for `PlayerShipDamagePacket`.
* The `ThreadedArtemisNetworkInterface` constructor now supports an optional `timeoutMs` parameter; if specified, ArtClientLib will give up if the connection isn't established within the given amount of time.
* Removed support for reading/writing long values from/to packets. (This feature wasn't used, as the protocol has no long values.)