update README

README.md

@@ -6,10 +6,10 @@ Shadowsocks for Windows
 #### Features
 
 1. System proxy configuration
-2. Fast profile switching
-3. PAC mode and global mode
-4. GFWList and user rules
-5. Supports HTTP proxy
+2. PAC mode and global mode
+3. GFWList and user rules
+4. Supports HTTP proxy
+5. Supports server auto switching
 6. Supports UDP relay (see Usage)
 
 #### Download
@@ -20,7 +20,7 @@ For >= Windows 8 or with .Net 4.0, download Shadowsocks-win-dotnet4.0-x.x.x.zip.
 
 For <= Windows 7 or with .Net 2.0, download Shadowsocks-win-x.x.x.zip.
 
-#### Usage
+#### Basic
 
 1. Find Shadowsocks icon in the notification tray
 2. You can add multiple servers in servers menu
@@ -29,17 +29,24 @@ proxy addons in your browser, or set them to use system proxy
 4. You can also configure your browser proxy manually if you don't want to enable
 system proxy. Set Socks5 or HTTP proxy to 127.0.0.1:1080. You can change this
 port in Server -> Edit Servers
-5. You can change PAC rules by editing the PAC file. When you save the PAC file
+
+#### PAC
+
+1. You can change PAC rules by editing the PAC file. When you save the PAC file
 with any editor, Shadowsocks will notify browsers about the change automatically
-6. You can also update the PAC file from GFWList. Note your modifications to the PAC
-file will be lost. However you can put your rules in the user rule file for GFWList.
-Don't forget to update from GFWList again after you've edited the user rule
-7. For UDP, you need to use SocksCap or ProxyCap to force programs you want
-to proxy to tunnel over Shadowsocks
+2. You can also update PAC file from GFWList (maintained by 3rd party)
+3. You can also use online PAC URL
 
-### Develop
+#### Server Auto Switching
 
-Visual Studio Express 2012 is recommended.
+1. Load balance: choosing server randomly
+2. High availability: choosing the best server (low latency and packet loss)
+3. Write your own strategy by implement IStrategy interface and send us a pull request!
+
+#### UDP
+
+For UDP, you need to use SocksCap or ProxyCap to force programs you want
+to proxy to tunnel over Shadowsocks
 
 #### License