Currently, this package only works with my custom Joey NMT version, but we should get back to depending on the upstream Joey NMT. Identify, which changes in the custom version are actually needed for this package. Maybe some of the changes are useful for a broader audience and can be pushed upstream. Otherwise, the changes should be moved into this package somehow, possibly by monkeypatching Joey NMT objects.

Additionally, take a look at how the batching works and if it changed in the upstream Joey NMT because we currently use an outdated version of torchtext for that and maybe the upstream Joey NMT still does, too. In that case, reworking the batching in upstream Joey NMT could be useful.

The package is currently called joeynmt_server, but for consistency with the other NLMaps packages, it should be called nlmaps_mt_server. Rename it.