Implement t/dataset/aliases.t and new.t with some TODOs.
Partially implement Dataset. Start debugging...
Dataset: quoting source is delegated to PrototypedData.
Dataset: fix get_option().
Fix test t/dataset/opt_parse.t
Fix test t/dataset/opt_multiple_values.t. It basically uses single-quotes.
Dataset: implement overload.
Dataset: API CHANGE: set_option() now accepts array-ref values. They are handled just the way Script handles them.