FineDiv: Create rounded corner image styles for HTML pages

This class can be used to generate rounded color image styles to decorate HTML page elements.

It generates only one image for the corners and a CSS style sheet to produce a cross browser compatible rounded corners effect that works without JavaScript.

Several parameters may be configured like the corner colors, radius, width and output image format.

The corners image can be generated in JPEG, PNG and GIF formats. When the GIF format is used, the corner edges may be transparent.

This class generates the corners image and CSS using an MD5 hash of the corner parameters to define the image and CSS file names. This way it avoids the overhead of generating new files when the corner parameters do not change.