https://github.com/NerdWalletOSS/dynamorm/pull/61
* **BACKWARDS INCOMPATIBLE CHANGE!**
``Model.query`` and ``Model.scan`` no longer return ALL available items.
Instead they stop at each 1Mb page. You can keep the existing behavior by
adding a ``.recursive()`` call to the return value.
Before::
books = Books.scan()
After::
books = Books.scan().recursive()
* This version introduces the ``ReadIterator`` object which is returned from
query and scan operations. This object exposes functions that allow for
better control over how a query/scan is executed. See the usage docs for full
details.