update README

README.md

@@ -1,20 +1,33 @@
 shadowsocks-libev
-===========
+=================
 
-shadowsocks-libev is a lightweight tunnel proxy which can help you get through
- firewalls. It is a port of [shadowsocks](https://github.com/clowwindy/shadowsocks).
+shadowsocks-libev is a lightweight obfuscated scoks5 proxy.
 
-Currently not stable yet.
- Please use [shadowsocks-nodejs](https://github.com/clowwindy/shadowsocks-nodejs).
+It is a port of [shadowsocks](https://github.com/clowwindy/shadowsocks).
+
+Only the client is ported. Please use [shadowsocks-nodejs](https://github.com/clowwindy/shadowsocks-nodejs) 
+to setup your server.
 
 installation
------------
+------------
 
-Edit local.c, change server hostname.
-
-Install the following package:
+Build the binary like this:
 
+```bash
     sudo apt-get install build-essential autoconf libtool libev-dev libssl-dev
+    automake --add-missing
     autoreconf
     ./configure && make
+```
 
+usage
+-----
+
+```
+    usage:  ss  -s server_host -p server_port -l local_port
+                -k password [-m encrypt_method] [-f pid_file]
+
+    info:
+                -m:  accept two encrypt methods, "table" or "rc4"
+                -f:  run in backgroud, with a valid path to the pid_file
+```