Parse .qua files into structs, based on the .qua format of
Quaver. The .qua file format uses the YAML format, so
serde_yaml
is used for parsing.
```rust use qua_format::Qua; use std::fs::File;
let path = "123.qua"; let mut qua = Qua::from_file(path).unwrap();
qua.title = "Never Gonna Give You Up".to_string();
let newfile = File::create("test.qua").unwrap(); qua.towriter(new_file).unwrap(); ```