ENH: order of magnitude improvement on parsing HDF5 BIOM tables, fixes #529
DOC: changelog mention
Merge branch 'master' of github.com:biocore/biom-format into parser_speed_bump

Conflicts:
	ChangeLog.md
ENH: iteritems, thanks @adamrp
Merge pull request #563 from wasade/parser_speed_bump

Order of magnitude improvement on HDF5 parser speed