Fixes slideshows transition=duration=1.0 bug.  #1557

Weird.  I thought I'd shave a millisecond off transition time when it was equal to duration.  Responsiveslides needs a whole 100ms in between them.  Adjusted it before sending out js settings.  I wonder if flexslider will have the same problem.
Merge pull request #1828 from openscholar/1557-qa_duration_bug

Fixes slideshows transition=duration=1.0 bug.  #1557
Merge looks good, however I think if someone actually selects this they are confused about the settings.