wiki: add Python links to the Resources page

[johntellsall]

(oddly I can't edit the wiki directly, is there something I'm missing?)

Python the Hard Way -- classic free book

Awesome Python Newsletter -- excellent weekly email with quality Python and data science articles

[wykhuh2]

@johntellsall I have to invite you as a contributer in order to add stuff to the wiki. I just sent you an invite. Maybe it would be better to create a separate repo dedicated to resources links. Thoughts?