update readme

Author: Gwan-He

README.md

@@ -30,8 +30,10 @@ lz4 : use lib/liblz4.a
 ```
 
 + new feature: client wrapper with consumer group supported, only available in c++11 or above env.
-run "make wrapper" to generate libslssdk_wrapper.a instead of libslssdk.a.
-see usage of client wrapper in sample_wrapper.cpp.
+
+Run "make wrapper" to generate libslssdk_wrapper.a instead of libslssdk.a.
+
+See usage of client wrapper in sample_wrapper.cpp.
 
 ## using SConscript