BUG: add metadata didn't fallback to json
ENH: output as json default dep on have_h5py, thanks @gregcaporaso and @adamrp
Merge branch 'master' of github.com:biocore/biom-format into add_metadata_noreq_h5py
DOC: typo
Merge pull request #573 from wasade/add_metadata_noreq_h5py

BUG: add metadata didn't fallback to json