Make PortRange options in NetworkACLEntry.
Merge pull request #52 from wt/master

Make PortRange options in NetworkACLEntry.
Add SQS dead letter queue from CloudFormation release 2014-01-29
Add InstanceID to AutoScalingGroup and LaunchConfiguration

Update for CloudFormation release 2014-1-2
Fix #54 ec2.DHCPOptions NTPservers -> NtpServers
Add SQS dead letter queue from CloudFormation release 2014-01-29
Add AutoScaling ScheduledAction from release 2014-01-27
Updates
Allow tags to be set on security groups

Allow tags to be set on security groups. EC2 classic security groups do
not support tags; if you try to set them, your template/stack will fail.
Update CHANGELOG.md
Allow Ref() in NetworkInterfaceProperty GroupSet list

This fixes #56 a different way than the pull request.
Fix #51: RecordSets in Route53 not formatted correctly
Bumping version to 0.4.0
Make `integer()` validator work with any integer-like object