wmm 1.1.1

1. Removed WMM coefficient files and URLs.
2. Adding note to README re: WMM output as predictions and referenced IGRF.

wmm 1.1.0

1. Updated Gauss coefficients for WMM2020.
2. Significantly improved numerical stability by using closed-form equation for associated Legendre polynomials, instead of recursion.
3. Improved speed by ~7x by using multidimensional arrays.
4. Per WMM2020, this version now displays a blackout zone warning when the horizontal intensity is below 6000 nT.
5. In addition to orthogonal magnetic field components, GetMagneticFieldWMM returns the magnetic field elements h, f, i, & d as well as their secular variation.

wmm 1.0.0

First release of wmm package. Contains 1 exported function, GetMagneticFieldWMM, which calculates magnetic field.