Paper: Frequentism and Bayesianism: A Python-driven Primer (Jake VanderPlas)

This is the final version – ready to be reviewed.
@jakevdp - as you say, hard to please everyone... you might gloss over it by saying "light from a star" or something suitably vague?  I'm just trying to make the language slightly clearer for non-astromers (not a problem for me, of course, but my understanding is that the language is supposed to be as non-field-specific as possible).  It's not a big deal, so if you really prefer it this way that's ok with me.