Binary Data event names incorrectly handled about rust-socketio

[kitgxrl]

In order to fix this while extracting the additional data I see three solutions:

1. Introduce Payload::BinaryText(Bytes, Vec<Value>)
2. Change Payload::Binary(Bytes) to Payload::Binary(Bytes, Vec<Value>) (Potentially Option<Vec<Value>> for easier checking?)
3. Emit both Payload::Text and Payload::Binary separately

1 sounds the best as it does not break the existing API and is easier to handle when both the binary data and additional Text data are related.