Remove trailing whitespace from README
Update Puppet modules for zookeeper and wirbelsturm-common
Update helper modules to latest version
Update docs
Bump version to 0.7.0
Improve regex that parses `vagrant ssh-config`, notably to allow `-` in SSH user names
Allow access to ZK ports 2888 and 3888 (required for ZK ensembles)
Update wirbelsturm to newer tools

1. Use aws cli command tools
Update the AWS documentation to use the new AWS CLI.

Added MacPorts package installation instructions alongside Homebrew instructions.
Fix retrieving of access keys/secrets after creating new IAM users.
Prompt for a CIDR to allow SSH access from. Allows a default of 0.0.0.0/0, which is all IPs.
Add prompt for secruity group name (defaults to 'wirbelsturm').

Only allow access to the various application specific ports by other EC2 instances in the secruity group.

Add support for VPC (currently commented out as the main project doesn't yet support it).