Merge #23

23: Add additional meta data to improve crate experience r=korken89 a=Nicoretti

* Add readme setting, so README.md is shown on https://crates.io/
* Add repository setting, so a link to the project repository
  is shown on https://crates.io/

Co-authored-by: Nicola Coretti <nico.coretti@gmail.com>

Author: bors[bot]

Cargo.toml

@@ -3,8 +3,12 @@ authors = [
     "Jonathan Pallant <github@thejpster.org.uk>",
     "Jorge Aparicio <jorge@japaric.io>",
 ]
+
 description = "A heap allocator for Cortex-M processors"
+repository = "https://github.com/rust-embedded/alloc-cortex-m"
 documentation = "https://docs.rs/alloc-cortex-m"
+readme = "README.md"
+
 keywords = [
     "allocator",
     "arm",