SWB 2 version 2.0.1

This is an unofficial release of the code documented in the report found here: https://pubs.er.usgs.gov/publication/tm6A59. Official, approved versions of the code will be released at code.usgs.gov once all internal USGS reviews are complete.

NOTE: a bug relating to the netCDF libraries used for the Windows executables was found, which may result in the following error message: