MAINT: ensure copy in subsample
ENH: collapse now operates over the table instead of reduce
MAINT/STY: removed print statement
TST: added median test for collapse
DOC: changelog mention
Merge pull request #547 from wasade/collapse_update

Collapse update
Merge branch 'master' of github.com:biocore/biom-format into ensure_ss_copy
DOC: changelog mention
Merge pull request #546 from wasade/ensure_ss_copy

MAINT: ensure copy in subsample