Troposphere

------------------

* Allow s3.Bucket AccessControl to be an AWSHelperFn
* Add AWS::ElasticLoadBalancingV2::ListenerCertificate
* Add serverless FunctionName and change how Tags are implemented
* Make AdjustmentType an optional property of ScalingPolicy as it is not used/supported for target (849)
* Add maintenance window for SSM (851)
* Add Tags, Tracing, KmsKeyArn, DLQ to serverless(SAM) (853)
* Add new AWS::SSM resources (854)
* EC2 NoDevice should be type boolean not dict (858)
* Fixes RecordColumns cardinality for InputSchema and ReferenceSchema (859)
* Make AWS::Batch::JobQueue::JobQueueName optional (860)
* Fixes ApplicationOutput/Output cardinality (863)

------------------

* Note: the s3.Bucket change (844) *may* cause a breaking change for non*named arguments.
* Add DefinitionBody to serverless API (822)
* Adding kinesis stream source to firehose (823)
* Add `Event::Rule::Target::EcsParameters` (824)
* Add S3 Transfer Acceleration to AWS::S3::Bucket (833)
* Add AvailabilityZone property to TargetDescription (834)
* Add Tags to NATGateway (835)
* Add ResourceLifecycleConfig to ElasticBeanstalk (836)
* Add AWS::Athena::NamedQuery (837)
* Added platformArn to Environment and ConfigurationTemplate (839)
* Events target (fixes 830) (840)
* Refactor s3.Bucket to remove custom __init__() and add tests (844)
* Be more explicit on the use of the Tags object for Tags (845)

------------------

* Added missing EU_WEST_2 constants. (776)
* Override object validation (780)
* Update PyPI Information (785)
* Adding IPv6 changes to AWS::EC2::Subnet (786)
* NetworkACL Protocl Constants (787)
* Add support for EFS encryption (789)
* Add AWS::ApiGateway::GatewayResponse (790)
* Add support for aurora*postgresql as a valid DB engine (791)
* adding sqs server side encryption (793)
* Support new code deploy options (794)
* Add AWS Batch Support (796)
* VPC expansion support (797)
* Add NLB Functionality (806)
* Fix typos in examples/DynamoDB_Table.py (807)
* Revert "Accept Join type as parameter default value as it returns a string (752)" (808)
* Change Cognito UserPool SchemaAttribute required value to boolean (809)
* Updating case of 'AssignIPv6AddressOnCreation' (810)
* Fix spelling error to in RedshiftVPC example (811)
* EFS example: SecurityGroupRule can't be referred to as a Ref (813)
* Update README.rst with current supported resources (814)
* Add CloudTrail EventSelectors (815)
* Add DAX support (818)
* Add KinesisAnalytics support (819)
* Add new ApiGateway resources (820)
* Add autoscaling example for http requests that closes 630 (821)
* Add new S3 Lifecycle Rule properties
* Add IoT DynamoDBv2Action and update DynamoDBAction properties
* Add EventSourceToken to Lambda::Permission
* Add new pseudo parameters
* Add DocumentationVersion to AWS::ApiGateway::Stage
* Add S3 Bucket MetricsConfiguration and fix TagFilter spelling
* Add TargetType to ELBv2::TargetGroup
* Add TargetTrackingConfiguration to AutoScaling::ScalingPolicy
* Add ReplaceUnhealthyInstances and Type to SpotFleetRequestConfigData
* Add ExtendedS3DestinationConfiguration to firehose DeliveryStream
* Add AWS::EC2::NetworkInterfacePermission

------------------

* Add support for latest Cloudwatch alarms properties (694)
* Raise ValueError for Outputs and Mappings * Fix Issue 732 (733)
* Add AWS::EMR::SecurityConfiguration support (738)
* Create CODE_OF_CONDUCT.md (740)
* Added UsagePlans to API Gateway example (741)
* EMR AutoScaling Complex Validation and Introduction of an ignore validator type (743)
* Add PrivilegedMode option to CodeBuild Environments (744)
* EFS DependsOn Ref to object fix (746)
* README * add syntax highlighting (747)
* Make handling of DependsOn more pythonic (748)
* Accept Join type as parameter default value as it returns a string (752)
* AWS SAM support (754)
* Fixed UsagePlan example to proper Ref (755)
* Fix cognito StringAttributeConstraints property names (Fixes 756)
* Add 'SourceAuth' property to CodeBuild Source (758)
* Make it easier to get at hidden attributes (Fixes 760)
* Size/IOPS should be positive_integers (761)
* Check that FIFO Queues end with .fifo (757)
* Add AWS::CloudWatch::Dashboard (Fixes 763)
* Ulimit's HardLimit and SoftLimit validator change (764)
* Adding EgressOnlyInternetGateway to EC2::Route (765)
* Allow passing in a dict into DashboardBody (767)
* Handle SQS QueueName using an AWSHelperFn (Fixes 773)
* LifecycleHook NotificationTargetARN and RoleARN are now optional
* Remove RoleArn from Events::Rule and add to Target property
* Add TracingConfig property to AWS::Lambda::Function
* Add Tags to some RedShift resources
* Add AWS::ApiGateway::DomainName
* Add AWS::EC2::EgressOnlyInternetGateway
* Add AWS::EMR::InstanceFleetConfig
* Add BinaryMediaTypes to ApiGateway::RestApi
* Add TargetTrackingScalingPolicyConfiguration
* Add TrailName to CloudTrail::Trail
* Add AlarmConfiguration and TriggerConfigurations
* Add Tags and TimeToLiveSpecification to DynamoDB::Table
* Add RetentionPeriodHours to Kinesis::Stream
* Add ReplicationSourceIdentifier to RDS::DBCluster
* Add LoggingProperties to Redshift::Cluster
* Add AWS Database Migration Service (DMS) support
* Add test target to Makefile
* Make it easier to download the latest CF resource spec
* Added and reverted out of this release:
* Fix pycodestyle issue in tests/test_yaml.py
* Output yaml (to_yaml) using cfn_flip (Fixes 567)
* Special case If during parameter checking (Fixes 772)
* Raise TypeError when a scaler AWSHelperFn is used in a list context (751)

------------------

* Fix typo in S3_Bucket.py example (696)
* Added .Ref & .GetAtt helper methods (697)
* Add Pseudo Parameter Ref objects (698)
* Fix NamespaceType typo in codebuild::Artifacts() (fixes 701)
* Add IpAddressType property to elbv2. (703)
* Add new AWS::Lambda::Function Tags support (705)
* Added ECS PlacementConstraints, PlacementStrategy, and ServiceName (706)
* Add missing CidrIpv6 property to securityrule. (710)
* Add missing properties to various objects in ec2.py (711)
* logs.LogGroupRetentionInDays is strictly defined list (712)
* Add ManagedPolicyName to AWS::IAM::ManagedPolicy (Fixes 714)
* Add better validations for Parameter Default types (Fixes 717)
* Add AWS::Cognito (fixes 720)
* Add required attribute, JobFlowId, to EMR::InstanceGroupConfig (722)
* Add WAFRegional support (723)
* fix for ElastiCacheRedis.py example to use awacs (725)
* Add EMR autoscaling (729)
* Add SshUsername to AWS::OpsWorks::UserProfile
* Add PlacementConstraints to AWS::ECS::TaskDefinition
* Add MaximumExecutionFrequency to Config SourceDetails

------------------

* Fix pycodestyle by using an explicit exception type
* Add more details to pycodestyle errors for travis runs
* Fix validator function exception test
* Remove limit check on conditions * Fixes 657
* Allow valid value for TargetGroup HealthCheckPort (659)
* Added step functions and basic tests (661)
* Adding example for CloudTrail (from http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws*resource*cloudtrail*trail.html) (#667)
* Fix ApiGateway.py sample (666)
* Update comment on type checking
* Added missing props to ec2.NetworkInterfaces (669) (670)
* Add WAF Common Attacks Sample (675)
* Updated constants with new instance types (674)
* SSM Targets * fix spelling mistake (Value => Values) (673)
* Do json validation on ApiGateway::Model Schema (Fix 679) (681)
* SQS: Add FifoQueue and ContentBasedDeduplication (687)
* VPCPeeringConnection: add PeerOwnerId & PeerRoleArn (688)
* IAM: Add InstanceProfileName to InstanceProfile (689)
* Add ApiGateway UsagePlanKey resource
* Add DeadLetterConfig property to Lambda::Function
* Add new subproperties to route53 and redshift (690)
* Route53: ChildHealthChecks is a list of strings (690)
* Fix typo in S3_Bucket_With_Versioning_And_Lifecycle_Rules.py (693)
* Allow a dict to be passed in to initalize Tags (692)
* Add SSM::Parameter
* Update autoscaling example to remove rebinding (695)