Spherical Harmonic I/O, Storage, and Conversions

Spherical harmonic I/O
`SHRead`	Read spherical harmonic coefficients from an ascii-formatted file.
`SHRead2`	Read spherical harmonic coefficients from a CHAMP or GRACE-like ASCII file.
`SHReadJPL`	Read spherical harmonic coefficients from a JPL ASCII file.
Spherical harmonic storage
`SHCilmToCindex`	Convert a three-dimensional array of complex spherical harmonic coefficients to a two-dimensional indexed array.
`SHCindexToCilm`	Convert a two-dimensional indexed array of complex spherical harmonic coefficients to a three-dimensional array.
`SHCilmToVector`	Convert a 3-dimensional array of real spherical harmonic coefficients to a 1-dimensional ordered array.
`SHVectorToCilm`	Convert a 1-dimensional indexed vector of real spherical harmonic coefficients to a 3-dimensional array.
`YilmIndexVector`	Determine the index of a 1D ordered vector of spherical harmonic coefficients corresponding to I, L, and M.
Spherical harmonic conversions
`SHrtoc`	Convert real spherical harmonics to complex form.
`SHctor`	Convert complex spherical harmonics to real form.