S3 Integration

[SeanRoy]

Add an integration to respond to S3 Events. Allow for a list of buckets and events

{"integration" : "S3",
 "buckets" : [
   { "bucket" : <bucket name>, "events" : ["s3:ObjectRemoved:*","s3:ObjectCreated:*"],
     "filter": {
               key: {
                 filter_rules: [
                   {
                       name: "prefix",
                       value: "<value>"
                   }
                 ]
               }
             }
     }
 ]}