Links to example shaping functions broken

[HornMichaelS]

Hi!

First off, thanks for the fantastic guide, it's making clear a field that looked impossible to understand for a long time.

I just wanted to bring to your attention that, in chapter 5, each of the links to flong.com are broken. The pages are still on the web, but they've been moved to flong.com/archive, so the updated links are:

• Polynomial: http://flong.com/archive/texts/code/shapers_poly/index.html
• Exponential: http://flong.com/archive/texts/code/shapers_exp/index.html
• Circular & Elliptical: http://flong.com/archive/texts/code/shapers_circ/index.html
• Bezier & Parametric: http://flong.com/archive/texts/code/shapers_bez/index.html