Document helper scripts to interact with the contracts

scripts/send-funds.js

@@ -1,5 +1,5 @@
 
-module.exports = function(cb) {
+module.exports = function(callback) {
   let recipient = process.argv[4];
   if (!recipient) {
     console.log('Please provide a recipient address');
@@ -8,4 +8,6 @@ module.exports = function(cb) {
   let amount = parseInt(process.argv[5]) || 1;
   console.log(recipient);
   web3.eth.sendTransaction({to: recipient, value: web3.toWei(amount), from: web3.eth.accounts[0]}, console.log);
+
+  callback();
 }