1) RunsetWrapper can fill both variables (isImage and isVideo) of a substrate of the original of a Result according to its file-extension.

Based on this information, detector can make a different foundlabels such labelables, LabeledLocations, and LabeledTrakcs.

2) Making a list of supported conversion is simplified.
Merge pull request #94 from lekomin/feature-fixes

Filling two variables of a substrate of the original of a Result