Pinax-stripe-light

This release saw contributions from 6 people!
- [PR 280](https://github.com/pinax/pinax-stripe/pull/280) ([Dan Olsen](https://github.com/danolsen)) - sync subscription on cancel
- [PR 272](https://github.com/pinax/pinax-stripe/pull/272) ([Tobin Brown](https://github.com/Brobin)) - fix admin filtering for customer admin
- [PR 252](https://github.com/pinax/pinax-stripe/pull/252) ([Chris Streeter](https://github.com/streeter)) - ignore customers who might be test customers
- [PR 283](https://github.com/pinax/pinax-stripe/pull/283) ([Nikolai Konovalov](https://github.com/berdoc)) - fix error raised when `USE_TZ=False`
- [PR 247](https://github.com/pinax/pinax-stripe/pull/247) ([Oli Bates](https://github.com/obates)) - add plan metadata
- [Issue 284](https://github.com/pinax/pinax-stripe/issues/284) ([Patrick Altman](https://github.com/paltman)) - sync subscription data immediately upon subscribe

- [PR 266](https://github.com/pinax/pinax-stripe/pull/266) added some docs for webhooks and signals

We continue to have a healthy group of contributors helping to maintain and
grow `pinax-stripe`.
- [Graham Ullrich](https://github.com/grahamu)
- [Camden Bickel](https://github.com/camdenb)
- [Patrick Altman](https://github.com/paltman/)
- [Anna Ossowski](https://github.com/ossanna16/)
- [Trevor Watson](https://github.com/cfc603)
- [Chris Streeter](https://github.com/streeter/)

This is mostly fixes and clean up to some bits of documentation but one
enhancement of the removal of Sites framework from being a hard requirement. It
is now optional, though if you are not running Sites framework, you'll want to
override some of the hooks in the `DefaultHookSet` to handle your specific
case.
- added a link to our code of conduct
- added support for wheels in our release packaging
- updated the classifier to Production/Stable (from Alpha!)
- [PR 253](https://github.com/pinax/pinax-stripe/pull/253) - fixed a typo
- [PR 261](https://github.com/pinax/pinax-stripe/pull/261) - fixed a documentation bug
- [PR 263](https://github.com/pinax/pinax-stripe/pull/263) - fixed documentation bug dealing with installation
- [PR 256](https://github.com/pinax/pinax-stripe/pull/256) - conditional sites framework import