Troposphere

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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)

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* Convert fake AWSHelperFns into AWSProperties (478)
* cfn script: allow update (484)
* Validate the template against AWS before stack creation (485)
* Fix capitalization in README (487)
* Remove duplicate waf FieldToMatch class (fixes 489)
* Tune validation logic and test cases for S3 bucket names (486)
* waf XssMatchTuple should be an AWSProperty (Fixes 498)
* Allow setting a different region for S3 upload (491)
* fix attribute for ApiKey (Enable -> Enabled) (492)
* Invoke join correctly (493)
* EMR: fix EBS configuration (497)
* EMR: Action on Failure Fix (CONTINUE_AND_WAIT*>CANCEL_AND_WAIT) (501)
* Rewritten the helper to be more flexible (502)
* Added support for Kinesis Firehose (505)
* Add support for VPC Flow Logs (507)
* Syntax highlighting for readme python sample (508)
* Added Name property to Kinesis streams (510)
* Availability zones and EC2 instance type (512)
* Add `AutoScalingReplacingUpdate` to `UpdatePolicy` (513)
* Removed validation for DBSubnetGroupName when creating a read replica with SourceDBInstanceIdentifier (515)
* EMR configurations values: also allow AWS helper functions (516)
* Fix AssociationParameters Value type to list of strings (518)
* Add DependsOn to Deployment and remove Enabled from StageKey (519)
* Update fields in apigateway StageDescription (521)
* Fix rename pep8*>pycodestyle and bump to fixed pyflakes (522)
* Allows MultiAZ=false with AvailabilityZone in rds (524)
* Do not require Status as a param in iam.AccessKey (525)
* Fix badges in README

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* Remove unnecessary AWSHelperFn from props
* ReplicationConfigurationRules Destination is now an object (380)
* Add WAF SizeConstraintSet and XssMatchSet
* Logs SubscriptionFilter (413)
* Elasticsearch support (415)
* Fixed ConfigSnapshotDeliveryProperties type (420)
* Adding support for EMR resources (421)
* Fix `ecs.TaskDefinition.Volumes` that was incorrectly flagged as required (422)
* AWS::ECR test example (423)
* Add cloudfront hostedzoneid for route53 (427)
* Typo in variable name (431)
* ScalingAdjustment is an integer (432)
* Add Compress to CloudFront (433)
* Added missing S3OriginConfig parameter(437)
* Allow both GetAtt and a basestring (440)
* Add VpcConfig to AWS::Lambda::Function (442)
* Add Version Resource to awslambda (443)
* Add Alias Resource to awslambda (444)
* Ignore If expression during validation of ASG (446)
* Add test and tweak fix for ASG MaxSize If fix (446)
* Provide Valid Lambda Function Memory Values for use in Parameters (449)
* Add FunctionName to Lambda::Function (452)
* Add support for EBS volume configuration in EMR resources (453)
* Add elasticsearch instance type constants (454)
* DomainName isn't a required parameter (457)
* Create Documentation To Help Contributors (458)
* Move Groups to property, add policy template version (460)
* Fix Elasticsarch Domain object naming and add backward compatibility (461)
* EC2 update FromPort, ToPort and Egress as optional (463)
* ApiGateway Resources (466)
* Added CloudWatch Events support (467)
* Import JSON Templates (468)
* Fix config Source object to take a list of SourceDetails (469)
* Update Contribute Document to Use Requirements.txt (470)
* Update to Apr 25, 2016 release (471)
* Implement LifecycleRule Transitions property (472)
* Better AWSHelperFn support in template generator (473)
* Fix Bucket AccessControl to allow Ref (475)
* Fix baseclass for AWS::Logs::Destination (481)
* Add test for AWS::Logs::Destination (482)