yaFyaml: yet another Fortran (implementation of) YAML

There is at least one other open source Fortran-based YAML parser.

The rationale for this one is simply to be compatible with the containers in gFTL. It is not intended to be a complete YAML parser, just the subset needed by my own projects. (Happy to accept additional contributed YAML capabilities, of course!)

Requirements:

• gFTL 1.5.0 or later
• gFTL-shared 1.3.0 or later

Supported Fortran compilers:

• ifort 2021.3.0
• gfortran 8.5, 9.4, 10.3, 11.2
• NAG 7.0 (7057)