Remove SNS topic from VPC CloudFormation stack

Instead of creating the SNS topic used for global stack notifications
inside of the VPC stack, it seems better to create it outside of
CloudFormation so that we can associate it with all other CloudFormation
stacks. This will allow us to get notifications more easily when stacks
are modified.
Make 8081 the Kibana port globally
Make the bastion root volume larger (128GB)
Template and parameter file references were broken
Add RELP to nyc-trees.logstash
Ensure that Apache collectd plugin uses apache_port
Fix /var/www/html race condition
Add variable grouping for monitoring servers
Create staging variable grouping; add Amazon NTP servers
Create VPC stack outputs for VPC ID and bastion subnet and IP
Create Packer template for cutting the monitoring AMI
Create deployment helper script to aid in creating AMIs
Add support for creating VPC stack to deployment helper
Move VPC stack creation into deployment-helper
Move data store stack creation into deployment helper
Move monitoring AMI and VPC stack update into deployment helper
Update README sections for deploying VPC and data store stacks