Refactored and added getFullOffsets() / visibleFromParentAndOffset() #27
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Summary of function changes
getFullOffsets
gets the full top,left,bottom,right offsets relative to the top,left corner of the browser. With an optional delta adjustment of results. Also returns object width / height.
visibleFromParentAndOffset
Extends the original visible function, to check relative to a parent view box, and its offsets
visible
original visible functionality parameters list by Sam Sehnert (backwards compatible)