Adding attributes to frame objects.

e.g slideIntervals and item attr.
Using this will ensure the againFrame functionality.
Creating 'getSlideIntervals' function to separate functionalities.
Updating last slide for frames that have 'data-onslide' attr.
Adding 'getFrameFromStrId' to work with 'data-againframe[id][intervals]'.
Adding 'data-againframe' functionalities.