Add badges to README (#5 closes #3)

Author: luigiberrettini

README.md

@@ -1,2 +1,5 @@
+[![AppVeyor build status](https://ci.appveyor.com/api/projects/status/s3a158jwtxgwco90/branch/master?svg=true)](https://ci.appveyor.com/api/projects/status/s3a158jwtxgwco90/branch/master?svg=true)
+[![Travis CI build status](https://travis-ci.org/EasyNetQ/docker-rabbitmq.svg?branch=master)](https://travis-ci.org/EasyNetQ/docker-rabbitmq.svg?branch=master)
+
 # docker-rabbitmq
-RabbitMQ Docker image creation tools
+RabbitMQ Docker image creation tools