Updated storyboard to properly assign DataColumnView (this was a weird error where even though xcode listed 'DataColumnView' in the Storyboard UI as the type of the component, internally it was treating it as a UIView
Refactored DataColumnView to no longer have a version that takes [Integeer], the data array must be stringified before passing into DataColumnView.  This simplified the initializer madness somewhat (but not completely).  I'm not sure removing the [Integer] variants was a good idea though. it may come back later
fixed createStringFromSeconds problems. 1) Since the NSTimeInterval (e.g. double) type was being used everywhere, the math that assumed type truncation wasn't working anymore.  2) str was being reset instead of appended to so it was always returning 0.  Fixed #1 by creating a temp var secondsInt which is an Int version of seconds, then the math starts working out again.