add ability to get the "type" of a variable as a string. Same name as in tsml used by the Scalar constructor.
add ability to get the "type" of a variable as a string. Same name as in
tsml used by the Scalar constructor.

Former-commit-id: 5e6396a08abda3f44217d79c82dae01ae7fc038a
latis-data/latis,latis-data/latis