Features
- Adds debug mode for verbose logging of libhoney activities to stderr. This can be enabled by passing `debug=True` to `init`.
Improvements
- Improperly configured events now log an error rather than raise a `SendError` exception.
Deprecations
- `send_now` is deprecated, you should use `new_event` to create a new event combined with `Event.send()` to enqueue the event. `send_now` does not block the application to send events immediately, but its name had generated significant confusion.