Enable fancy fonts by default on Vista/7/8
Improve comments on new fxPreview control
Improve comments on swirl function
New polar conversion distort

Three modes:

1) Rectangular to polar
2) Polar to rectangular
3) Polar inversion (like Paint.NET)

For fun, load an image, run method 1, then method 2.  The image is
successfully reconstructed, minus some inevitable loss in the compressed
areas.  Neat!