v0.8.0: (MINOR) Add AssertRoute53ZoneIsAssociatedWithVPC and Bug Fixes (#35)
* Add function to check for zone <-> VPC association * Rework AssertEC2InstancesBalancedInSubnets * Tweaks to AssertEC2InstancesBalancedInSubnets * Refactor AssertEC2InstancesBalancedInSubnets to only accept instances list