Readme updated

README.rst

@@ -15,7 +15,7 @@ SOCKS proxy client for asyncio and aiohttp
 Dependencies
 ------------
 python 3.5+
-aiohttp 2.1+
+aiohttp 2.3.2+
 
 Features
 --------
@@ -175,8 +175,10 @@ aiohttp usage
                                proxy_auth=ba) as resp:
           if resp.status == 200:
             print(await resp.text())
-    except aiohttp.ProxyConnectionError:
+    except aiohttp.ClientProxyConnectionError:
       # connection problem
+    except aiohttp.ClientConnectorError:
+      # ssl error, certificate error, etc
     except aiosocks.SocksError:
       # communication problem
 
@@ -185,22 +187,3 @@ aiohttp usage
     loop = asyncio.get_event_loop()
     loop.run_until_complete(load_github_main())
     loop.close()
-
-Proxy from environment
-^^^^^^^^^^^^^^^^^^^^^^
-
-.. code-block:: python
-
-  import os
-  from aiosocks.connector import ProxyConnector, ProxyClientRequest
-
-  os.environ['socks4_proxy'] = 'socks4://127.0.0.1:333'
-  # or
-  os.environ['socks5_proxy'] = 'socks5://127.0.0.1:444'
-
-  conn = ProxyConnector()
-
-  with aiohttp.ClientSession(connector=conn, request_class=ProxyClientRequest) as session:
-        async with session.get('http://github.com/', proxy_from_env=True) as resp:
-          if resp.status == 200:
-            print(await resp.text())