v0.9.0

This release adds some new features, such as the wn.validate module and wn validate subcommand to help wordnet authors check WN-LMF files for errors, improves performance on WN-LMF file loading, and fixes many small bugs. It also notably updates the index with the latest release of the Open English Wordnet, the Open Multilingual Wordnet, and the Open German Wordnet. It also adds the OpenWordnets for English and Portuguese and the Kurdish wordnet KurdNet to the index.

Thanks to @fcbond, @arademaker, @vcvpaiva, @sinaahmadi, @hdaSprachtechnologie, @rwingerter55, and @jmccrae for their help with Wn or with preparing the indexed wordnets!