Quickly deploy/destroy a local Vagrant test VM (requires vagrant in $PATH).
$ ./testvm.sh # (provisions a new test VM through Vagrant if none exist, then connects to it)
$ ./testvm.sh destroy # (removes any existing test VMs & cleans up Vagrant tmp + box cache)
$ ./testvm.sh alpine # (looks for the most popular Vagrant Cloud box matching 'alpine', provisions and connects to a new test VM with it)