POM dependency updates and Kafka Topic per Message Definition

@mariamhakobyan-zanox,

I've made the following two major changes:

1. Allow messages to be routed to a topic contained in the message's event body, at the same level of payload. This allows multiple topics to be used in the same kafka producer;
2. Also upgraded kafaka from 0.8.0 beta1 to 0.8.1.1 release; together with scala version from 2.9.x to 2.10.x; Vertx. from 2.1M1 to 2.1.1.

Please let me know if need any clarification. Thanks.