auto using etc+alpha texture in android platform,automatic handler for you!
------------------------------------CN-------------------------------------------
NOTE:使用导入shader请注意，是否覆盖了之前NGUI的shader
1、使用请打开Editor/ETCTexturePostprocessor.cs文件，修改 ADD TARGET FOLDER TO AUTO USE ETC + ALPHA 下面的文件目录自动处理信息
2、切换平台Android、iOS将自动对设置的目录进行贴图转换
3、在工具栏TextureSetting/ETC/可以手动转换（全部设置、选择目录转换）
4、在Editor/ETCTexturePostprocessor.cs的EditorSelectedFolderWindow中可以输入一些shader列表以供选择
5、手动目录转换窗口增加DontChanged选项将使用RGBA32真彩贴图
version 1.0
- FIX:自动设置窗口列表高度不对
- FIX:如果目录图片过多导致的内存暴涨问题
version 1.1
- ADD:增加ChangeETC传入材质球转化
- ADD:右键材质球直接转化
------------------------------------ENG-------------------------------------------
NOTE:care for importing this package,sure to not convert the NGUI orignal shaders.
1、you can modify "ADD TARGET FOLDER TO AUTO USE ETC + ALPHA" under Editor/ETCTexturePostprocessor.cs，add automatic folder.
2、after change the Editor Platform to Android or iOS will trigger automatic handler.
3、you can click topbar button:TextureSetting/ETC/ change selection folder by yourself.
4、you can modify "EditorSelectedFolderWindow" under Editor/ETCTexturePostprocessor.cs for new shader list!
5、in editor windows you can toggle the "DontChange" to reconvert use RGBA32.