增加阴影效果,通过滤镜实现的阴影效果，并且增加了由本地带有渐变色图片实现的颜色渐变效果-increase shadow effect to some flex objects

纯as3 图片切换效果 默认过渡效果共六种，包括渐变，电视墙，滴水融化，百叶窗，拉滑块，划入。支持自定义过渡方式，停留时间，过渡时间设置，-Pure as3 image transition effects default total of six transition effects, including gradients, TV wall, dripping melted blinds, pull the slider included. Support for custom transi