Refactor of attributes to simplify their construction
New custom attribute example with documentation
Fixed up compatibility for Python 2.6. Fixes #28.
Added Python 2.6 for travis
Corrected docstring
Added test for round tripping a unicode set
Explicit testing for Python 3.4
Attributes should not be checked for None for update_item. Fixes #34
Added downloads badge
Added pypy to tox
Added pypy config to travis
Started implementation of full table backup/restore
Added print statements to the model example
Finished implementation of full table backup/restore, with tests
Documentation on table backup/restore
Release notes for 1.3.3
Appended feature to readme
v1.3.3
Bug fix for create_table where multiple indexes share the same attribute that is not a key attribute.
Fixing dict key casing