changed the phrase ¨Rellene el código del <code>incrementer</code> función...¨to Rellene el código de la función <code>incrementer...</code> as it was grammatically incorrect
2. I replaced `currying` by `currificación` and I implemented minor type fixes.
3. I fixed the blockquotes convenientement to javascript rules and comments.
4. I added anchor elements with links to wikipedia (curriying, arity and partial application). P.D.: For partial application, Wikipedia is not the article in spanish version.
