Troposphere

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* Extra template validation (635)
* Update ECS to Jan 17, 2017 release (642)
* Add Timezone property to DBInstance (643)
* Test Python 3.6 (644)
* Adding RDS engine support for oracle*se2 (646)
* Correct required in ecs.Service (645)
* Add Separator property to IoT Firehose Action
* Add Fn::Split function (647)
* Added to_dict() method to troposphere.Template (651)
* Allow use of AWSHelperFn for IOPS (652)
* Allow HelperFN w/ autoscaling policies (654)

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* Improve readability of AssumeRolePolicyDocument attribute (591)
* Add Environment to Lambda Function (616)
* Adding DataSources to OpsWorks App and RdsDbInstances to OpsWorks Stack (621)
* Added SNS::Subscription resource (SubscriptionResource) (622)
* Added CodeBuild Project resource and a CodeBuild example (624)
* Add back support for Python 2.6 (626)
* Fixed missing add_resource in example Cloudwatch rule (629)
* Create new property Environment for aws lambda Function (631)
* Add KmsKeyArn to Lambda Function
* Add CopyTagsToSnapshot to RDS::DBInstance
* Fix pycodestyle issues with examples/Lambda.py
* Add AWS::SSM::Association
* Add AWS::EC2::SubnetCidrBlock and AWS::EC2::VPCCidrBlock
* Add mutually_exclusive validator
* Add DocumentType to AWS::SSM::Document
* Add OpsWorks Resources: UserProfile and Volume
* Update opsworks per 2016*11*22 changes
* Allow both dict and string for opswork CustomJson
* Add IPv6 support from 2016*12*01 update

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* Note: the dynamodb change below may cause backwards compatibility issues.
There have been deprecation warnings for a while.
* Replace dynamodb module with dynamodb2 (564)
* Add CodeCommit as a supported AWS resource type
* Add update of github Releases page to RELEASE doc
* Update elasticache for 2016*10*12 changes (592)
* Support for S3 Lifecycle Rule property NoncurrentVersionTransitions (596)
* Include resource title in required attr exception (597)
* Added Placement class for the Placement property in LaunchSpecifications. (598)
* Add EFS example (601)
* Add support to old mysql db engine (602)
* Fix typo in Example Allowed Values (603)
* Remove `title` validation. Fixes 428 (605)
* Add support for conditions in cfn2py script (606)
* Added MongoDB default port to constants (608)
* Add HttpVersion prop to DistributionConfig (CloudFront HTTP/2 Support) (609)
* Added missing QueryStringCacheKeys property to CloudFront ForwardedValues (612)
* Add a validator for ELB names (615)

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* Add SpotPrice to SpotFleet LaunchSpecifications
* Add new properties to ECS (Clustername to Cluster and Family to TaskDefinition)
* Add Alias object to KMS (fixes 568)
* Added cross*stack references (569)
* Handle lambda => awslambda mapping in cfn2py (573)
* Add support for Tags to Certificate Manager Certificates (574)
* Adding enhanced monitoring to rds.DBInstance (575)
* Add support for LogGroupName in Logs::LogGroup (576)
* Update Export param (579)
* Add support for `Fn::Sub` (582)
* RDS DBInstance Engine required even when DBSnapshotIdentifier is set (583)
* Resource updates for 2016*10*06 changes (Fixes 584)
* Add AWS::ApiGateway::UsagePlan (fixes 585)
* Add AWS::CodeCommit::Repository (fixes 586)
* Provide better type checking for values in from_dict (587)
* Allow HelperFn in UpdatePolicy for ASG (588)
* Fixed from_dict case where you have a list of non BaseAWSObjects (589)

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* Add TargetGroupArn and fix ContainerPort (549)
* Update ApiGateway resources (550)
* Add support for AutoScalingCreationPolicy (552)
* Change param type for resource: RestAPI (553)
* Add support for IAM Roles in ECS Task Definitions (556)
* Allow Tags on AWS::CloudFormation::Stack (557)
* Added support for protocol in container definition PortMapping property. (558)
* Add Tags prop to Kinesis::Stream (565)
* Add a sample ECS Cluster template (559)
* Add support for ElasticsearchVersion in Elasticsearch Domain (560)
* WAF SizeContraint needs to be an AWSProperty (Fixes 561)
* Add Tags prop to Kinesis::Stream (565)

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* Support "UserName" property for AWS::IAM::User 529
* Remove double S from S3ObjectVersion (fixes 530) (531)
* Fix TemplateGenerator import logic. (533)
* Add Name attributes for IAM groups and roles (535)
* Automatically check if zip_file exceeds 4096 chars 537
* Add AWS Certificate Manager (538)
* Add Application Auto Scaling (539)
* CloudFront updates (Aug 9, 2016) (540)
* Add PerformanceMode to FileSystem resource (541)
* Add AWS Internet of Things (542)
* Extend Template constructor. (543)
* Add application loadbalancer objects and properties (544)
* Improve check_zip_file to calculate a minimum length (548)