add format localization
fix MoneyPath tests
add format localization tag money_localize
fix: correct detection for the zero value
add new tests
adding new requirements to the setup
better tests, add tox config
fix tests for Django 1.4
cosmetic changes
update readme: supported versions python, django
add tests python 3.x
python3 and many new tests
fix custom manager inheritance.
change deserialization of None values
remove unused variables and imports
simplify to_python method.
fix deserialization of None values
remove managers patching on field initialization
add runtime managers patching via class_prepared signal
simplify comparison