Updated README.md
Updated README.md

* Run docker-compose in background
* Exported CURRENT_HOST variable for docker-machine virtual & local machine
* Amended connector commands in order to use CURRENT_HOST variable

debezium/debezium-examples,debezium/debezium-examples,debezium/debezium-examples,debezium/debezium-examples,debezium/debezium-examples