Update crate metadata to image-rs org

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.14.1"
 license = "MIT/Apache-2.0"
 description = "PNG decoding and encoding library in pure Rust"
 authors = ["nwin <nwin@users.noreply.github.com>"]
-repository = "https://github.com/PistonDevelopers/image-png.git"
+repository = "https://github.com/image-rs/image-png.git"
 edition = "2018"
 exclude = [
     "tests/*",

README.md

@@ -1,9 +1,9 @@
 # PNG Decoder/Encoder
-[![Build Status](https://travis-ci.org/PistonDevelopers/image-png.svg?branch=master)](https://travis-ci.org/PistonDevelopers/image-png)
-[![Crates.io](https://docs.rs/png/badge.svg)](https://docs.rs/png)
+[![Build Status](https://travis-ci.org/image-rs/image-png.svg?branch=master)](https://travis-ci.org/image-rs/image-png)
+[![Documentation](https://docs.rs/png/badge.svg)](https://docs.rs/png)
 [![Crates.io](https://img.shields.io/crates/v/png.svg)](https://crates.io/crates/png)
-![Lines of Code](https://tokei.rs/b1/github/PistonDevelopers/image-png)
-[![License](https://img.shields.io/crates/l/png.svg)](https://github.com/PistonDevelopers/image-png)
+![Lines of Code](https://tokei.rs/b1/github/image-rs/image-png)
+[![License](https://img.shields.io/crates/l/png.svg)](https://github.com/image-rs/image-png)
 
 PNG decoder/encoder in pure Rust. Currently `pngcheck` is the most usable part. Build with `cargo build --release --example pngcheck`.