editor_config.js改动

editor_all.js    btnCmds增加 'mybutton'，'mybutton2'

改动 icons.png icons.gif

ueditor.css 增加 
.edui-default .edui-for-mybutton .edui-icon {	
	background-position: -826px -43px;
}

.edui-default .edui-for-mybutton2 .edui-icon{	 
	background-position: -750px -97px;
}
