object identity should be readable from .id after successful save
wholesale import result as object data after create, overriding any locals
assert that a re-save on a fresh instance should not update
attempt to make handling of dirty state between new / persisted more consistent
fix falsy assumption about identifier field being accessible
assert that an instance preserves identity under serialization
catch failing scenario by asserting that neither create nor update are called when re-saving
remember to reset dirty state and set object lifetime status to persist when coming from create
when resetting dirty state, also remember to reset changed fields
0.6.4