Readme: Add travis badge and support notice
Readme: Add travis badge and support notice

jaimeguzman/amazon-ecs-agent,aws/amazon-ecs-agent,swipely/amazon-ecs-agent,seiffert/amazon-ecs-agent,aws/amazon-ecs-agent,aws/amazon-ecs-agent,jaimeguzman/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,seiffert/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,swipely/amazon-ecs-agent,aws/amazon-ecs-agent,swipely/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,swipely/amazon-ecs-agent