update readme.

@@ -101,7 +101,7 @@ Donations: [https://github.com/simple-rtmp-server/srs/blob/develop/DONATIONS.txt
 
 ## Usage
 
-<strong>Step 1:</strong> get SRS 
+<strong>Step 1:</strong> Get SRS.
 <strong>Download slow? Please use [mirrors](#mirrors) for SRS.</strong>
 
 ```
@@ -109,14 +109,14 @@ git clone https://github.com/simple-rtmp-server/srs &&
 cd srs/trunk
 ```
 
-<strong>Step 2:</strong> build SRS,
+<strong>Step 2:</strong> Build SRS.
 <strong>Requires Centos6.x/Ubuntu12 32/64bits, others see Build([CN][v2_CN_Build],[EN][v2_EN_Build]).</strong>
 
 ```
 ./configure && make
 ```
 
-<strong>Step 3:</strong> start SRS 
+<strong>Step 3:</strong> Start SRS 
 
 ```
 ./objs/srs -c conf/srs.conf
@@ -175,18 +175,24 @@ Supported operating systems and hardware:
 
 ### Wiki
 
-SRS 1.0 wiki
+#### SRS 1.0 wiki
 
 Please select your language:
 * [SRS 1.0 English][v1_EN_Home]
 * [SRS 1.0 Chinese][v1_CN_Home]
 
-SRS 2.0 wiki
+#### SRS 2.0 wiki
 
 Please select your language:
 * [SRS 2.0 English][v2_EN_Home]
 * [SRS 2.0 Chinese][v2_CN_Home]
 
+#### SRS 3.0 wiki
+
+Please select your language:
+* [SRS 3.0 English][v3_EN_Home]
+* [SRS 3.0 Chinese][v3_CN_Home]
+
 ## Product
 
 The `features`, `compare`, `release` and `performance` of SRS.