elastic IP address for VPC instances
handle EIPs for both VPC and standard EC2 instances
check for elastic_ip before warning about not having one
Merge branch 'master' of github.com:mitchellh/vagrant-aws
release elastic ip address upon termination
catch up to tip
added elastic_ip entry in config spec
Merge pull request #65 from bwhaley/master

Elastic IP for VPC instances per issue 18