simplify usage

@@ -2,7 +2,7 @@ Simple-RTMP-Server
 ==================
 
 SRS(SIMPLE RTMP Server) over state-threads created in 2013.<br/>
-SRS is a simple, [RTMP](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryRTMP)/[HLS](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS), [high-performance](https://github.com/winlinvip/simple-rtmp-server/wiki/Performance), single/multiple(plan) processes, edge(plan)/origin live server.<br/>
+SRS is a simple, [RTMP](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryRTMP)/[HLS](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS), [high-performance](https://github.com/winlinvip/simple-rtmp-server/wiki/Performance), single/multiple(plan) processes, edge(plan)/origin live server, compile depends on [st](http://sourceforge.net/projects/state-threads), [ssl](http://www.openssl.org/) and [http-parser](https://github.com/joyent/http-parser), use [nginx](http://nginx.org/), [ffmpeg](http://ffmpeg.org/) and [cherrypy](http://www.cherrypy.org/) as tools.<br/>
 SRS supports [vhost](https://github.com/winlinvip/simple-rtmp-server/wiki/RtmpUrlVhost), rtmp([encoder push](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryRTMP), client/edge pull), ingester(srs pull), [HLS](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS), [transcoding](https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG), [forward](https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG), [http hooks](https://github.com/winlinvip/simple-rtmp-server/wiki/HTTPCallback). <br/>
 Blog: [http://blog.csdn.net/win_lin](http://blog.csdn.net/win_lin) <br/>
 See also: [https://github.com/winlinvip/simple-rtmp-server](https://github.com/winlinvip/simple-rtmp-server) <br/>

@@ -36,6 +36,12 @@ gperftools-2.1.zip
     编译和使用参考压缩文件中的README和doc目录。
 
 links:
+    nginx:
+        http://nginx.org/
+    http-parser:
+        https://github.com/joyent/http-parser
+    state-threads:
+        http://sourceforge.net/projects/state-threads
     ffmpeg: 
         http://ffmpeg.org/ 
         http://ffmpeg.org/releases/ffmpeg-2.1.1.tar.gz