Lambda function is not compatible with API Gateway's lambda proxy

[Rafael Ferreira]

Looks like that is now enabled by default when you create a lambda function trigger and it breaks our guide.

Notes:

• http://docs.aws.amazon.com/apigateway/latest/developerguide/integrating-api-with-aws-services-lambda.html
• http://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-set-up-simple-proxy.html#api-gateway-simple-proxy-for-lambda-output-format

[Rafael Ferreira]

fixed as of version 0.4.0