Peer to Peer Helpers

Please can we change the `clone-node.js` script to work:
a) `clone-node.js` accepts a number of nodes to clone (e.g. `node clone-node.js 2` - create 2 more nodes)
b) Nodes should be startable from the root (e.g. `node node-1/index.js`)
c) Maybe even a `node start-all-nodes.js` script?
d) The `clone-node.js` script should delete all nodes and reclone

After playing a bit, I made some of these changes myself, because I got so sick and tired of cloning, deleting, `cd`ing, starting...