w3nco and sp are deprecated

[AlexanderRichert-NOAA]

Description

As a headsup, the w3nco and sp libraries have been deprecated in favor of w3emc and ip, respectively. We are trying, as much as possible, to phase them out.

Solution

w3emc and ip should provide all needed functionality. I am able to build (though have not attempted to test) building without w3nco and sp by modifying/removing the appropriate find_package and target_link_libraries invocations. w3emc should work as a swap-in replacement without any tweaking of compiled code. Same for ip version 5.0, but for version 5.1, the sp functionality is contained in a Fortran module and therefore requires use sp_mod wherever sp procedures are called. I'm happy to help contribute CMake logic for handling various versions so that the older libraries can still be used if/when needed.