ElfroVoacap - VOACAP HF propagation engine translated from Fortran to C#

Translated from voacapl (https://github.com/jawatson/voacapl, James Watson), a port of VOACAP
(NTIA/ITS, https://its.ntia.gov/software/high-frequency/voacap-propagation-model/).
The CCIR/URSI coefficient files embedded in the DLL (Data\*.gz) come from the VOACAP distribution
(itshfbc\coeffs).

Disclaimer (from the VOACAP distribution):
The software contained within was developed by an agency of the U.S. Government.
NTIA/ITS has no objection to the use of this software for any purpose since it is
not subject to copyright protection in the U.S.
No warranty, expressed or implied, is made by NTIA/ITS or the U.S. Government as to
the accuracy, suitability and functioning of the program and related material, nor
shall the fact of distribution constitute any endorsement by the U.S. Government.

All modifications made by J. A. Watson to the original VOACAP source are made available
under the Creative Commons CC0 licence (see COPYING / LICENSE in voacapl).

The GPL-3+ parts of voacapl (dst2csv, dst2ascii) are NOT included.
