Simple-aws-ec2

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**Features and Improvements**

- Reword the "detect os type from AMI" logic to be more accurate.
- Add the following public APIs:
- ``simple_aws_ec2.api.os_type_to_users_mapper``
- ``simple_aws_ec2.api.detect_os_type``

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**Minor Improvements**

- now ``wait_for_status`` methods will automatically add a ``\n`` when exists.

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**Minor Improvements**

- the waiter method now can do the check instantly.

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**Features and Improvements**

- Add the following public API:
- :class:`simple_aws_ec2.StatusError <simple_aws_ec2.exc.StatusError>`
- :class:`simple_aws_ec2.Eip <simple_aws_ec2.ec2.Eip>`
- :meth:`simple_aws_ec2.Eip.from_dict <simple_aws_ec2.ec2.Eip.from_dict>`
- :meth:`simple_aws_ec2.Eip.is_associated <simple_aws_ec2.ec2.Eip.is_associated>`
- :meth:`simple_aws_ec2.Eip.query <simple_aws_ec2.ec2.Eip.query>`
- :meth:`simple_aws_ec2.Eip.from_id <simple_aws_ec2.ec2.Eip.from_id>`
- :meth:`simple_aws_ec2.Eip.from_public_ip <simple_aws_ec2.ec2.Eip.from_public_ip>`
- :class:`simple_aws_ec2.EipIterProxy <simple_aws_ec2.ec2.EipIterProxy>`

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**Bugfixes**

- Fix a bug that :meth:`~simple_aws_ec2.ec2.Image.deregister` method may fail when trying to delete snapshot immediately. Now it wait for the image got deregistered then start deleting snapshot.

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**Bugfixes**

- Fix a bug that :meth:`~simple_aws_ec2.ec2.Ec2Instance.wait_for_status` and :meth:`~simple_aws_ec2.ec2.Image.wait_for_status` failed to respect the list of provided ``stop_status`` and ``error_status``.