QuakeML deserialization in rust

This python implementation by Nima Nooshiri has been used as reference.

Usage

```rust use std::path::PathBuf; use crate::quakeml::read_quakeml;

fn main() {
    let path = PathBuf::from(r"sample/data.quakeml");
    let catalog = read_quakeml(&path);
    println!("catalog data: {}", catalog);
}

```