Updating initial README.md from template

Author: James Siri

README.md

@@ -1,2 +1,7 @@
-# aws-robomaker-sample-application-helloworld
+## AWS Robomaker Sample Application Helloworld
+
 Each of these packages is a sample application using ROS to demonstrate the use of the RoboMaker service and integration of other AWS services with ROS. 
+
+## License Summary
+
+This sample code is made available under a modified MIT license. See the LICENSE file.