Merge pull request #1 from lvv/master

Pull for phase-1
adding streamcorpus_filter.convert for loading JSON and making a FilterNames object

usage:

    ( zcat mention-dump.json.gz | python -m streamcorpus_filter.convert | gzip > mention-dump.scf.gz ) 2> log

refining tests
refining setup.py, but it has a bug -- does not install into virtualenv!?
fixing save_filter_names so that it can take a file_obj instead of a path
fixing second path in streamcorpus_filter.convert
counting correctly
counting correctly
providing a link to the WLC mention-dump.scf.gz
Merge branch 'master' of https://github.com/trec-kba/streamcorpus-filter