图像差异比较工具，DiffImg 2.0.0 发布

DiffImg 是一个简单的图像比较工具，可用来比较相同尺寸的两个 RGB 图像，并提供两个图像的差异比较数据。

Release Notes: This release has a new metric engine allowing easy addition of new metrics. Support for 16-bit and 32-bit mono channel images (TIFF). Adds drag&drop, a new metric "perceptual diff", gain/offset on displayed images, and an interactive "navigator" window. Slideshow mode can use files with different suffixes (e.g. compare file.png with file.jpg). Vietnamese, Swedish, and Portuguese translations have been added。