Upgrading to berkshelf 3 and updating to a valid wheezy AMI.
Updating to valid AMI
Updating default mesos to version 0.16.0
Changing to ebs backed wheezy AMI because it's turtles all the way down.
Merge pull request #32 from mdsol/feature/upgrading-to-berkshelf-3

Upgrading to berkshelf 3 and updating to a valid wheezy AMI.