Adding format 2.1 spec
ENH: version support
Merge branch 'master' of github.com:biocore/biom-format into issue509
Merge branch 'master' of git://github.com/biom-format/biom-format into issue517
Updating the table dump to the latest table version
ENH: Validator validates 2.1
tuple fix, thanks @adamrp
Adding description for the group metadata datasets structure
Addressing @adamrp's comments
Merge pull request #521 from josenavas/issue517

Adding format 2.1 spec
Merge pull request #523 from wasade/issue509

Issue509