Helper crate for the SCPI protocol as spoken by the Owon SPE power supplies;
Tested on an Owon SPE 3102
```rust
use owon_spe::SPE;
fn main() {
let mut spe = SPE::from_serialport("/dev/ttyUSB0").unwrap();
let info = spe.idn().unwrap();
println!("Model: {}, Serial: {}, FW: {}", info.model, info.serial, info.fw);
}
```