Using WordNet as Maven Dependency

[reckart]

It would be nice if DKPro LSR could be used with WordNet without having to create a resource.xml and without having to download WordNet manually. We already use extjwnl which can load WordNet from a Maven dependency... we should be able to benefit from that.

[logological]

@reckart, is this issue fixed? (I haven't reviewed your commits in detail so I don't know if they offer only a partial solution.)