V1.1.0 updates

Some long needed updates. Improves usability and leverages more of the datapoints available through the airbrake error reporting API. Includes a helper for fetching a logger object, pre-configured with an AirbrakeHandler, and many other improvements.

Updated [the README](https://github.com/samstav/airbrake-python/blob/v1.1.0/README.md) to reflect the simplified interface.
I think that for some applications, setting `auto-notify` to False will be valid for creating groups of exceptions that happen in a very small amount of time. It can also help users who have smaller API limits. We have already seen the benefit of that in our project