Add git-setup and hub to Vagrant box
Make check for existing metapolator checkout more conservative
Improve update-box

Add usage and command-line argument checking

Update an existing metapolator checkout to help “vagrant up”

Make the script idempotent
Remove some example configuration we’ll probably never need
Allow default port to be set for red-pill

Make red-pill default to port given by RED_PILL_PORT environment
variable. If  this is unset, the choice is random as before.

Fix a confusing error when an already-used port is used.

In the Vagrant box, forward the range of ports given by the environment
variable VAGRANT_RED_PILL_PORTS, set to a single value or single
inclusive range A-B; default 3000. Inside the Vagrant box, set
RED_PILL_PORT to the first port in VAGRANT_RED_PILL_PORTS.
Add tree for installation demo