Simple-aws-ec2

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**Features and Improvements**

- add lots of EC2 instance attributes
- add helper methods to call EC2 metadata API from EC2 instance inside.
- add method :meth:`~simple_aws_ec2.ec2.Image.os_type` to guess the AMI OS type, and then get the user name.

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**Breaking change**

- all method now take ec2_client as the first argument. no longer need ``boto_session_manager``.

**Features and Improvements**

- add :class:`~simple_aws_ec2.ec2.Image` class.

**Minor Improvements**

- :meth`~simple_aws_ec2.ec2.Ec2Instance.from_tag_key_value` now take list of values.

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**Bugfixes**

- fix a bug that the :meth:`~simple_aws_ec2.ec2.Ec2Instance._yield_dict_from_describe_instances_response` method failed to yield instances objects.

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**Bugfixes**

- fix a bug that when you describe ec2 instances with instance ids, we should not use any paginator configuration.

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**Miscellaneous**

- rename ``Ec2InstanceIterproxy`` to ``Ec2InstanceIterProxy``.

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**Features and Improvements**

- First release
- Add ``EC2Instance`` data class