Travis-encrypt

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Added
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- Functions to load and dump configurations with ordering preserved
were added to encrypt.py for API usage

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Fixed
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- Removed extra whitespace from functions in encrypt.py doctrings

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Added
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- Example in README.rst of encrypting an environment variable

Changed
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- Refactored encrypt.py docstrings using numpy guidelines

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Changed
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- Output password to stdout without enclosing doubles quotes

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Added
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- License file to be included with distribution

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Fixed
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- Omit new tests directory from coverage report