BloscPackHeader learned to return it's own checksum_impl
put compression as part of the pack loop, not inside sink or source
alter the API in the CompressedSink ABC
apparently, we can serialize numpy arrays now
shift computation of the digest back into the sink
pep8 too many blank lines
typo
add the oreder to the numpy metadata
let's call this a PlainNumpySink
fix order and size computing
fix missing colun
API sketch for unpack_numpy_fp, still quite broken though
totaly refactor the way CompressedSinks give data
apparently we have rudimentary roundtrip for numpy arrays
pep8
chanage numpy roundtip test slightly
numpy -> np in tests
fix a refactoring fail in the CompressedMemorySource, need some unit tests for it
test with all numpy dtypes, fix using itemsize
implement the contiguity requirement