Python motivation

This is a rough version of motivational slides for python - based on @sritchie73's R motivational slides.
Idea is that they would be presented at the beginning of a python lecture. Thoughts?
@katyhuff I often run into memory issues in R with the same data that I can handle fine in Python- but that may be ebacuse I'm a better python programmer than an R one! I'll fact-check that and add in your comments.