Fix argument parsing with --validate-policy-file

Merge pull request #64 from kz/fix/required-arguments

Fix argument parsing with --validate-policy-file (fixes #14)

Prometheus metrics exposed

Merge pull request #58 from kz/feature/metrics

Implement metric collection (resolves #1)

Add Python 2.7 compatibility

Contribution from @kz - many thanks ! 👍

Bug fixes

Add infoq

Signed-off-by: Mikolaj Pawlikowski <mikolaj@pawlikowski.pl>

More consistent policy schema for `randomSample`

Courtesy @antoine-g.

Initial open source release !

PowerfulSeal is now available on PyPi: https://pypi.python.org/pypi?:action=display&name=powerfulseal&version=1.0.1

pip install powerfulseal