2.1.0

Added

• zim.creator.Creator(language=) can be specified as List[str]. ["eng", "fra"], ["eng"], "eng,fra", "eng" are all valid values.

Changed

• Fixed zim.providers.URLProvider returning incomplete streams under certain circumstances (from openzim/kolibri#40)
• Fixed zim.creator.Creator not supporting multiple values in for Language metadata, as required by the spec