update readme.

README.md

@@ -31,7 +31,7 @@ Cppnet is a proactor mode and multithreaded network with C++11 on tcp. Support W
 
 All the interface files are in [include](/include). The interface definitions for library initialization and timer are in [CppNet](/include/CppNet.h):    
 ```c++
-class CCppNet {
+class CppNet {
 public:
     // common
     // init cppnet library.

README_cn.md

@@ -31,7 +31,7 @@ Cppnet是一个封装在TCP协议上的proactor模式multi-thread C++11网络库
 
 所有的接口文件都在 [include](/include) 中，其中关于库初始化和用户自定义定时器的接口定义在 [CppNet](/include/CppNet.h) 中：   
 ```c++
-class CCppNet {
+class CppNet {
 public:
     // common
     // init cppnet library.