Added Calculator Data Model.
Renamed View files to View Controller files.
User State Updated.
Expanded Calculator Data properties.
Added Text Fields and Labels to View Controller.
Set initial view up with default calculator data.
Calculates Original Price and Discount Price
Got swipe to graph working.
Fixed setting Calculator Data model values.
Now handles user errors. With nice feedback to swipe right.
Fixed Swiping back and forth.
Added QuartzGraphView
Got graph view to display proper text.
Fixed Graph Display. Bars now appear correctly.
Fixed labels on graph to be centered (mostly)
Added README file. Updated Comments.