/docs/Release-0.6.txt

 1o add tab widget
 2o add file browser widget
 3o add opengles backend
 4o port to android
 5o port to rt-thread
 6o port to wince
 7o port to iphone
 8o more documation.
 9o multi font size supported.
10o re-implement window animation.
11o performace and memory optimization.
12o use gb2312 font to replace unicode fnt.
13o use google pinyin as default input method.
14o re-create vs2008 project, and port desktop to windows.
15o re-implement default font to minimized the memory size.
16o change font_canvas to interface, so it can be optimized on different
17platform.