Troposphere

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* Clarify the license is a [BSD 2*Clause license](http://opensource.org/licenses/BSD*2*Clause)
* Add FindInMap type check for AutoScalingGroup validation of group sizes [GH*285]
* Implement the template Metadata section [GH*286]

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* Rename lambda*>awslambda [GH*268]
* Add t2 large instance type [GH*269]
* IAM: status required and managedpolicyarns [GH*272]
* Fix wrong prop name in rds.OptionGroup OptionGroupConfigurations*>OptionConfigurations [GH*274]
* Add CloudFormation CustomResource [GH*278]
* Add rds snapshot on delete example [GH*280]
* Unable to pass Cluster name as String [GH*281]
* Fix unable to set StringValue on ObjectField in DataPipeline [GH*283]

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* added AWS::CloudFormation::Stack NotificationARNs property [GH*243]
* Add additional import for PrivateIpAddressSpecification [GH*247]
* Add true s3 bucket name validator [GH*249]
* Replace strict `int` comparison by flexible `troposphere.validators.integer` [GH*251]
* Add validation for AZMode property on CacheCluster objects [GH*252]
* Fixing Opsworks Naming (ThresholdWaitTime -> ThresholdsWaitTime) [GH*253]
* Adding AutoScalingType to OpsWorks Instance [GH*255]
* Allow extending classes + tests [GH*257]
* Release June 11, 2015 [GH*259]
* Add M4 instances and Memcached port [GH*260]
* Add property for Subnet: MapPublicIpOnLaunch [GH*261]
* Minor improvements and fixes [GH*262]
* Update LoginProfile. Note: this is a breaking change and requires adding a
Password= keyword parameter into LoginProfile. [GH*264]
* Add 2 additional properties (elasticache:CacheCluster:SnapshotName and opsworks:Layer:LifecycleEventConfiguration) [GH*265]

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* Fix two elasticache properties [GH*196]
* Add interim MinimumProtocolVersion to CloudFront ViewerCertificate [GH*218]
* Missing OriginPath in cloudfront.py [GH*220]
* Fix DBInstance constraints in order to allow the creation of RDS read*only replicas [GH*221]
* Add properties CharacterSetName, KmsKeyId, and StorageEncrypted to AWS::RDS::DBInstance [GH*224]
* Add Route53 HostedZoneVPCs, HostedZoneTags, HealthCheckTags
* Add new properties from 2015*04*16 CloudFormation release [GH*225, GH*240]
* Allow default region for GetAZs() [GH*232]
* Make AvailabilityZones parameter optional in AutoScalingGroup
* EventSubscription resource + EC2 types [GH*227]
* Python 3.4 support [GH*228]
* examples fix: users is list [GH*237]
* SNS Topic fields are not required [GH*230]
* Make AvailabilityZones parameter optional in AutoScalingGroup [GH*236]

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* Support AWS helper functions in lists during validation [GH*179]
* Update README [GH*183]
* Fixing RedshiftClusterInVpc example; incorrect SG setup [GH*186]
* Add optional NonKeyAttributes to DynamoDB Projection class [GH*188]
* Change AutoScaling ScheduledAction StartTime, EndTime, and Recurrence to optional [GH*189]
* CloudFront forwarded values required on cache behavior [GH*191]
* DynamoDB attribute definitions required [GH*192]
* Add some ec2 required fields [GH*193]
* Fix ElasticBeanstalk resources [GH*213]
* Fix iam Policy Resource/Property bug [GH*214]

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* Fix UpdatePolicy validation [GH*173]
* Add AWS::CloudFormation::Init ConfigSets support [GH*176]
* Change CloudWatch Alarm's Threshold prop to be basestring [GH*178]