improve readme

README.md

 
 # Quickstart
 ```typescript
+import {RippleAPI} from 'ripple-lib'
 import {treeRead, treeWrite} from 'xrpio'
 
 const api = new RippleAPI({ server: "..." }) 
 
 const data = await treeRead(api, [dataRootHash])
 console.log(data) //"Arbitrary string data 123"
+```
+
+# A simple run-ready example for the testnet
+```typescript
+import { treeRead, treeWrite, Wallet } from 'xrpio'
+import { RippleAPI } from 'ripple-lib'
+import fetch from 'node-fetch'
+
+export const makeTestnetWallet = () : Promise<Wallet> => fetch('https://faucet.altnet.rippletest.net/accounts', {
+    method: 'POST',
+    headers: {
+        'Accept': 'application/json',
+        'Content-Type': 'application/json'
+    },
+}).then((raw:any) => {
+    return raw.json().then(content => content.account)
+});
+
+(async()=>{
+    const api = new RippleAPI({server: 'wss://s.altnet.rippletest.net:51233'})
+    await api.connect()
+    const fromWallet = await makeTestnetWallet()
+    const toWallet = await makeTestnetWallet()
+    await new Promise((res, rej) => setTimeout(res, 10000)) //it takes a moment for the wallets to become active
 
+    const rootHash = await treeWrite(api, "test123", fromWallet, toWallet.address)
+    const data = await treeRead(api, [rootHash])
+    console.log(data)    
+})()
 ```
 
 # [Full documentation](https://gitea.nitowa.xyz/docs/xrpio)

package.json

 {
   "name": "xrpio",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "repository": {
     "type": "git",
     "url": "https://gitea.nitowa.xyz/npm-packages/xrpio.git"