Best its worked so far, I believe there is still a bug somewhere in the shading though.
delete old contour plugin
Fixed several bugs, including shading and one in which the x and y axes were flipped.
2D sampler works and passes chain back to client
2D sampling is animated
Starting a large refactor
Continuing to refactor into Plot/OneDeePlot/TwoDeePlot objects.

The TwoDeePlot successfully renders and animates; need to test that One Dee does
the same.
Continuing large js refactor; added tabbed view and put everything into a single javascript.
JS refactor continues, plotting in one and two dimensions from the same page with the same javascript now works.
Delete a variety of files that are no longer necessary after refactoring.
Refactored submit/callback to be one function for each.

This involved taking advantage of the fact that when the submit function is called,
`this` refers to the element that was clicked to call it. This also enabled svgs to be
drawn in the tab for each dimension so that they can exist independant of each other.