Results: add mask type: "none", "ROI" or "mask image" to results output

[chalkie666]

make a new "String, String" result to put in the DataContainer for the type of ROI/mask used, so the user knows after the fact if they used a ROI or mask or not.

[etadobson]

@chalkie666 - Does this refer to:

// enumeration of different mask types
public enum MaskType { Regular, Irregular, None };

So Regular, Irregular, and None represent the different mask statuses, "ROI", "mask image", and "none" respectively? or am I missing something? Then we can just include a String to indicate the maskType, ie String maskStatus?

[ctrueden]

There are advantages (and disadvantages) to strong typing rather than using String. Do the mask types be extensible? If not, they should probably stay as an enum. Otherwise, we could consider an "extensible enum" pattern; here is an example.

[ctrueden]

See also 8ff13666, which added the current mask type logic to DataContainer etc.