Rust driver for notecard

This is a rust driver for the blues.io notecard based on embedded-hal.

```rust use notecard::Note;

let mut note = Note::new(i2c); note.initialize().expect("could not initialize notecard.");

if note.ping() { info!("notecard found!"); } else { error!("notecard not found!"); }

info!("note: card.time"); info!("note: time: {:?}", note.card().time(&mut delay).unwrap().wait(&mut delay));

info!("querying status.."); info!("status: {:?}", note.card().status(&mut delay).unwrap().wait(&mut delay)); ```