chuusai.com links are broken

[ptwales]

First link in the first exercise is to:

• http://chuusai.com/blog/2012/04/27/shapeless-polymorphic-function-values-1/

But clicking on it redirects us to:

• http://milessabin.com/blog/2012/04/27/shapeless-polymorphic-function-values-1/

which is now "purehempseedoil.com".

chuusai.com says it's now underscore.io http://underscore.io/blog/2012/04/27/shapeless-polymorphic-function-values-1/ 404s. So I don't know if the original blog post linked to still exists.