Migrate docs

Author: halx99

docs/MainPage.h

@@ -1,12 +1,12 @@
 /*!
 @cond GEN_REFERENCE_BOOK
 
-@mainpage axis
+@mainpage axys
 
 @image html cocos2dx_portrait.png
 
-@section sec1 About axis
-axis is based on cocos2d-x-4.0, cocos2d-x is a open source project is designed to be a cross-platform 2D game engine for building 2D games, demos and other graphical/interactive mobile applications.
+@section sec1 About axys
+axys is based on cocos2d-x-4.0, cocos2d-x is a open source project is designed to be a cross-platform 2D game engine for building 2D games, demos and other graphical/interactive mobile applications.
 It runs on top of OpenGL 2.0 and OpenGL ES 2.0 and is written in C++.\n
 This project is based on the famous <A HREF="http://www.cocos2d-iphone.org">"cocos2d-iphone"</A> project.\n