Featurehub-sdk

Added in support for server based poll interval changes, stale environments, consistent logging name (now "featurehub_sdk"), updated example to match. Production grade SDK.

What's Changed
* Python SDK Refinements by rvowles in https://github.com/featurehub-io/featurehub-python-sdk/pull/15
* Todo example by rvowles in https://github.com/featurehub-io/featurehub-python-sdk/pull/16


**Full Changelog**: https://github.com/featurehub-io/featurehub-python-sdk/compare/v0.0.1...v0.0.2

First official release, includes support for:

- getting features via Streaming
- getting features via Polling
- client side evaluated rollout strategies support