adding dynamic table name support. closes #21
fixed destroying passed in keys when performing getItems. closes #28
version bump
omitting null attributes when deserializing objects from dynamodb. closes #29
removing null values when saving a new item. closes #27
version bump
Merge branch 'master' into json

* master:
  version bump
  removing null values when saving a new item. closes #27
  omitting null attributes when deserializing objects from dynamodb. closes #29
  version bump
  fixed destroying passed in keys when performing getItems. closes #28
  adding dynamic table name support. closes #21
fix serialization of empty sets