Identicon

This is an Identicon implementation in rust.

Example:

```rust use identicon_rs::Identicon;

fn main() { let fluffysamurai = "fluffy-samurai"; let teststring = "identicon_rs";

// stored example
let identicon_fluffy = Identicon::new_default(fluffy_samurai);
identicon_fluffy.save_image("output_1.png");

// chained example with no border
Identicon::new_no_border(test_string).save_image("output_2.png");

} ```

TODO