sofars 0.6.0

Pure Rust implementation of the IAU SOFA library
Documentation 
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/// Rotate an r-matrix about the x-axis.
pub fn rx(phi: f64, r: &mut [[f64; 3]; 3]) {
    let s = phi.sin();
    let c = phi.cos();

    let a10 = c * r[1][0] + s * r[2][0];
    let a11 = c * r[1][1] + s * r[2][1];
    let a12 = c * r[1][2] + s * r[2][2];
    let a20 = -s * r[1][0] + c * r[2][0];
    let a21 = -s * r[1][1] + c * r[2][1];
    let a22 = -s * r[1][2] + c * r[2][2];

    r[1][0] = a10;
    r[1][1] = a11;
    r[1][2] = a12;
    r[2][0] = a20;
    r[2][1] = a21;
    r[2][2] = a22;
}