Added Nickey's website to Kellett Coders

1. Reworded parts of website (e.g. from “coders” to “coders and their
(coding) teachers”)
2. Commented out the “Credit” part (I never delete stuff unless I am
totally sure that I will not use it in the future)
3. Made up for the “Credit” part by including Nickey in the “Coders and
Teachers” section and putting his name in bold