Function ineichen_batch 

pub fn ineichen_batch(
    zenith: &[f64],
    airmass_absolute: &[f64],
    linke_turbidity: f64,
    altitude: f64,
) -> (Vec<f64>, Vec<f64>, Vec<f64>)

Batch Ineichen clear sky model. Returns (ghi_vec, dni_vec, dhi_vec).