Save corpora to disk as Gzips
Save corpora to disk as Gzips

Still using MalletCorpus underneath as it saves metadata inline with
the documents. No other corpus has this, AFAIK.

cscorley/changeset-feature-location,cscorley/changeset-feature-location,cscorley/doc2vec-feature-location,cscorley/doc2vec-feature-location