image v0.25.4 brings faster WebP decoding, orientation metadata support, fast blur

A new version of image crate has just been released! The highlights of this release are:

• Decoding lossless WebP images 2x to 2.5x faster, thanks to a variety of optimizations done by fintelia
• An approximate but much faster blur implementation was contributed by torfmaster
• Orientation metadata is now supported, so you can display photos with the correct rotation (by fintelia and myself)

There are also some bug fixes to decoding animated APNG and WebP images, and other minor improvements.

Note that orientation from metadata isn't applied automatically when loading the image (yet) because that would be a breaking change. But the API makes correctly handling it very easy. I'm happy with how it came together, and how we managed to implement it without adding any complex dependencies!