Issue a token: working code

- Fix bugs in submit and verify helper function
- Tweak tutorial and placement of helper function
- Finish drafting sample code
- Put sample code into tutorial

content/_code-samples/submit-and-verify/README.md

@@ -0,0 +1,32 @@
+# Submit and Verify
+
+Example JavaScript code using ripple-lib to submit a signed transaction blob and wait until it has a final result.
+
+Example usage:
+
+```js
+// example testnet creds. Don't use for real
+const address = "raXDGCShEGqYz2d94qkv1UmAh2uJd3UTea"
+const secret = "ssNBEKCkEY3W6YFfrjcSoNit91Vvj"
+api = new ripple.RippleAPI({server: 'wss://s.altnet.rippletest.net:51233'})
+api.connect()
+api.on('connected', async () => {
+  const prepared = await api.prepareTransaction({
+    "TransactionType": "AccountSet",
+    "Account": address
+  })
+  const signed = api.sign(prepared.txJSON, secret)
+
+  const result = await submit_and_verify(api, signed.signedTransaction)
+
+  if (result == "tesSUCCESS") {
+    console.log(`Transaction succeeded: https://testnet.xrpl.org/transactions/${signed.id}`)
+  } else if (result == "unknown") {
+    console.log(`Transaction status unknown. `)
+  } else if (result == "tefMAX_LEDGER") {
+    console.log(`Transaction failed to achieve a consensus.`)
+  } else {
+    console.log(`Transaction failed with code ${result}: https://testnet.xrpl.org/transactions/${signed.id}`)
+  }
+}
+```