Salt-container-map

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* Fixed sending wrong signal in ``kill`` function.
* Fixed container removal in ``remove_all_containers``.

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* Fixed access to a method removed from Docker-Map.

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* Fixed import for compatibility with Docker-Map.

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* Added build function and built state.
* Added controlled shutdown to container removal (``remove_all_containers``).
* De-duplication of image names before pull.
* Configurable ``base_image`` and ``core_image``.
* Key ``out`` is only returned by module functions for non-empty output.
* Various bugfixes from `0.1.9b1`.

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* Added tag whitelist to ``cleanup_images`` module method and ``images_clean`` state.
* Adapted to changes in Docker-Map 0.6.6b1.

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* Skip registry authentication for prefixed images.
* Removed more keyword arguments attached by Salt.