update readme, add why srs.

@@ -17,12 +17,21 @@ Download from ossrs.net:
 1. Completely rewrite HLS following m3u8/ts spec, and HLS support h.264+aac/mp3.
 1. Completely rewrite HLS following m3u8/ts spec, and HLS support h.264+aac/mp3.
 1. High efficient RTMP deliverying support 7k+ concurrency, vhost based, both origin and edge.
 1. High efficient RTMP deliverying support 7k+ concurrency, vhost based, both origin and edge.
 1. Embeded simplified media HTTP server for HLS, api and HTTP flv/ts/mp3/aac streaming.
 1. Embeded simplified media HTTP server for HLS, api and HTTP flv/ts/mp3/aac streaming.
-1. Variety input: RTMP, pull by ingest file or stream(HTTP/RTMP/RTSP), push by stream caster RTSP/MPEGTS-over-UDP.
-1. Popular internet delivery: RTMP for flash, HLS for mobile(IOS/IPad/MAC/Android), HTTP flv/ts/mp3/aac streaming for user prefered.
+1. Variety input: RTMP, pull by ingest file or stream(HTTP/RTMP/RTSP), push by stream caster 
+RTSP/MPEGTS-over-UDP.
+1. Popular internet delivery: RTMP for flash, HLS for mobile(IOS/IPad/MAC/Android), HTTP 
+flv/ts/mp3/aac streaming for user prefered.
 1. Enhanced DVR: segment/session/append/api plan, customer path and HTTP callback.
 1. Enhanced DVR: segment/session/append/api plan, customer path and HTTP callback.
-1. Multiple feature: transcode, forward, ingest, http hooks, dvr, hls, rtsp, http streaming, http api, refer, log, bandwith test and srs-librtmp.
-1. Best maintainess: simple arch over state-threads(coroutine) and only linux platform, common server x86-64/i386/arm/mips cpus, rich comments, strictly follows RTMP/HLS/RTSP spec.
-1. Easy to use: both English and Chinese wiki, typically config files in trunk/conf, traceable and session based log.
+1. Multiple feature: transcode, forward, ingest, http hooks, dvr, hls, rtsp, http streaming, 
+http api, refer, log, bandwith test and srs-librtmp.
+1. Best maintainess: simple arch over state-threads(coroutine), single thread, single process 
+and only linux platform, common server x86-64/i386/arm/mips cpus, rich comments, strictly 
+follows RTMP/HLS/RTSP spec.
+1. Easy to use: both English and Chinese wiki, typically config files in trunk/conf, traceable 
+and session based log, linux service script and install script.
+1. MIT license, open source with product management and evolution.
+
+Enjoy it!
 
 
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