- Addresses #138,#172,#173 with support for multiple binders in an application
- Binders can be of multiple types (e.g. Rabbit or Kafka), as well as multiple binders of the same type connecting to different system (e.g. multiple Rabbit binders connecting to different Rabbit clusters)
- Binders are now created in a separate context, allowing for multiple configurations
- Adds the `spring.cloud.spring.binders` namespace that allows for creating configuration properties for multiple binders
- Add support for default binder, modify Kafka tests to use multiple brokers when running embedded
