TST: new test data
TST: more test data
TST: tests for biom_open
TST: removing write test for json
BUG: biom_open can now create writable files
MAINT: h5py.File cannot take 'wb' as a mode
ENH: better handling of test files
DOC: numpydoc'd
DOC: :curly_loop:
Merge pull request #445 from wasade/issue_442

Issue 442