Updated README.

Author: denpamusic

README.md

@@ -34,14 +34,40 @@ $bitcoind = new BitcoinClient([
     'ca'     => '/etc/ssl/ca-cert.pem'  // optional, for use with https scheme
 ]);
 ```
-Then call methods defined in [Bitcoin Core API Documentation](https://bitcoin.org/en/developer-reference#bitcoin-core-apis) with magic
+Then call methods defined in [Bitcoin Core API Documentation](https://bitcoin.org/en/developer-reference#bitcoin-core-apis) with magic:
 ```php
 $bitcoind->getBlock('000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f');
 ```
-or as an argument
+To send asynchronous request, add Async to method name:
+```php
+$bitcoind->getBlockAsync(
+	'000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f',
+    function ($success) {
+    	//
+    },
+    function ($exception) {
+    	//
+    }
+);
+```
+
+You can also send requests using request method:
 ```php
 $bitcoind->request('getBlock', '000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f');
 ```
+or requestAsync method for asynchronous calls:
+```php
+$bitcoind->requestAsync(
+	'getBlock',
+    '000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f',
+    function ($success) {
+    	//
+    },
+    function ($exception) {
+    	//
+    }
+);
+```
 
 ## License