Initial add of area_curve
Refactored steps into functions and included multiple area polygons.
Correction to rectangle (Riemann Sum) algorithm.
Included area as well as Riemann Sum rectangles.
Debugging Riemann Sum.
Debugging Riemann Sum.
Refactoring.
Code cleanup.
Included slider control.
Changed slider control colour.
Slider events.
Included another function.
Refactoring to enable event handling. Included redraw of panels based on slider events.
Debugged redraw of panels so that they are freshly drawn upon slider changes.
Debugging calculation of area.
Included dynamic area label.
Included exact area using scipy.integrate
Code cleanup.
Included labels for xa and xb
Removing IDE-specific files.