rust_md5

This is a very simple implementation of the md5 specification - RFC 1321 used to begin learning Rust.

Usage

First, build the project with cargo build. It mimics the usage of md5sum thusly:

```

echo 'hi there' | ./target/debug/rust_md5 12f6bb1941df66b8f138a446d4e8670c - ```

or

```

echo 'unicode, ok ✔' > file.txt ./target/debug/rust_md5 file.txt 34a7fafe48ccb9d3f18f09949cbfa96f file.txt ```

There are some simple test cases taken from the specification, which can be executed with cargo test.