Amazon ECS CLI - Release v0.3.0

• Feature - Add support for compose option env_file.
• Feature - Add support for session environment variables for compose option
  env_file and environment.
• Feature - Add support for deployment parameters to compose service commands.
  Users can supply --deployment-max-percent and --deployment-min-healthy-percent to
  ecs-cli compose service create/up/scale commands
• Feature - Add support for configurable prefixes for resources created by the cli.
  Users can now call ecs-cli configure to configure
  • prefix used for the Cloudformation stack in ecs-cli up command,
  • compose project name prefix used for task definition and started by field
    in ecs-cli compose commands,
  • compose service name prefix used by ecs-cli compose service command
• Enhancement - Update ECS-optimized AMIs to latest 2016.03.a.
• Enhancement - Add License file to the ecs-cli executable. Users can view the License
  for the ECS CLI and its dependencies by calling ecs-cli license