Oasapi

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* [dev] fix tag name to remove "v" (for readthedocs latest build)
* [dev] fix travis ci python version for doc

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* Improve validation of array parameters
* Improve documentation

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* Push the sdementen/oasapi docker image to Docker Hub on each release
* Update doc on Docker image use and pipeing a swagger to oasapi

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* Support URL and stdin (with -) as SWAGGER for the CLI

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* [dev] PyPI deployment through Travis CI

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* Fix script form of the cli (``oasapi`` instead of ``python -m oasapi``)