PNG libraries for Rust

• png is a pure Rust PNG and APNG decoder and encoder with access to chunks and metadata.
• image is the high-level image library: open any common format, resize, convert, save. It uses the png crate for PNG.

• image The image crate is Rust's main image library. How to open and save PNG files, resize, get dimensions without decoding, set PNG compression.
• png The png crate is a pure Rust PNG and APNG decoder and encoder. How to decode a PNG to RGBA, encode a PNG, read text chunks, set compression.