小图片拼接的另一个算法。也可以看作是二维装箱问题。游戏制作中往往有很多小图片需要调用，一个个地load效率太低，一般是把它们拼接成一张大图片。这个类能够有效地进行图片拼接，内附说明文档。-Another small picture stitching algorithm. Also can be seen as a two-dimensional bin-packing problem. Game is often a lot of small images need to call, one