added CDI function gribapiLibraryVersion(major_version, minor_version, revision_version) [Feature #5043]

* This way it could be used in out-of-source builds with some modifications.

* len is default spec for CHARACTER.

* Non-standard type kinds cannot be part of one-line function declarations.

* Also ensure no data gets assigned to an unused table.

* The name field might be whitespace only (and for echam4 in one case is).