UserInputGetter now accepts (?).

Note that UserInputGetter has always accepted (help). And you can now use (?)
too.

Example:

    Red Example Score (2013) - materials

        1: magic numbers (Red Example Score)
        2: pitch range inventory (Red Example Score)
        3: tempo inventory (Red Example Score)

        materials - new (new)
        materials - new for editable mainline class (nmc)

    > new

    Enter material package name> ?
    Value  must be space-delimited lowercase string.