Added an example of how to use SqsSubscription option

examples/2016-10-31/sns_sqs/.gitignore

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+transformed-cfn-template.yaml

examples/2016-10-31/sns_sqs/README.md

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+# SNS-SQS Event Source Example
+
+Example SAM template for processing messages on an SNS-SQS.
+
+## Running the example
+
+```bash
+# Set YOUR_S3_ARTIFACTS_BUCKET to a bucket you own
+YOUR_S3_ARTIFACTS_BUCKET='YOUR_S3_ARTIFACTS_BUCKET'; \
+aws cloudformation package --template-file template.yaml --output-template-file cfn-transformed-template.yaml --s3-bucket $YOUR_S3_ARTIFACTS_BUCKET
+aws cloudformation deploy --template-file ./cfn-transformed-template.yaml --stack-name lambda-sns-sqs-processor --capabilities CAPABILITY_IAM
+```
+
+After your CloudFormation Stack has completed creation, send a message to the SNS topic to see it in action:
+
+```bash
+YOUR_SNS_TOPIC_ARN=arn:aws:sns:us-east-1:[your_account_id]:[your_topic_name]; \
+aws sqs send-message --target-arn $YOUR_SNS_TOPIC_ARN --message '{ "myMessage": "Hello SAM!" }'
+```

examples/2016-10-31/sns_sqs/index.js

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+async function handler (event, context) {
+  const records = event.Records
+  console.log(records)
+  return {}
+}
+
+module.exports.handler = handler

examples/2016-10-31/sns_sqs/template.yaml

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+AWSTemplateFormatVersion: '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Description: Example of processing messages on an SNS-SQS with Lambda
+Resources:
+  MyTopic:
+    Type: AWS::SNS::Topic
+  MyFunction:
+    Type: AWS::Serverless::Function
+    Properties:
+      CodeUri: ./index.js
+      Handler: index.handler
+      Runtime: nodejs8.10
+      Events:
+        MySQSEvent:
+          Type: SNS
+          Properties:
+            Topic: !Ref MyTopic
+            SqsSubscription: true
+
+Outputs:
+  MyTopic:
+    Description: "MyTopic ARN"
+    Value: !Ref MyTopic