Dev-env

Added

* added build_python_package.sh
* added [Travis Client](https://github.com/travis-ci/travis.rb) to Ubuntu 16.04 dev env
* added core python dev packages to docker dev env image so that every project doesn't have to add them

Changed

* Nothing

Removed

* Nothing

Added

* added kill-and-rm-all-docker-containers.sh

Changed

* Nothing

Removed

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Added

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Changed

* get bin/run_unit_tests.sh working again on travis
* moving nose==1.3.7 from setup.py to requirements.txt

Removed

* Nothing

Added

* added run_repo_security_scanner.sh
* cURL added to docker image simonsdave/xenial-dev-env

Changed

* Nothing

Removed

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Added

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Changed

* run_unit_tests.sh no longer chown's /app/.coverage

Removed

* Nothing

Added

* added support for customizing --security-opt command line option
to docker run executed by run_unit_tests.sh
using the DEV_ENV_SECURITY_OPT environment variable
* run_unit_tests.sh now allows specification on the command line
of the directories in which unit tests can be found

Changed

* Nothing

Removed

* Nothing