Paper: Scientific Computing with SciPy for Undergraduate Physics Majors (Bill Baxter)

Paper for SciPy2014 proceedings.  I'm a GitHub and rst novice so this should be interesting!  I'm having two issues: first, I don't see how to get my figure file onto GitHub.  Second, I'm clearly doing the reference labels for tables and figures incorrectly.  Hopefully someone can point me in the right direction!
Lemire has two excellent blog posts on the dangers of Excel.  Personally, I would never use Excel for programming, but I think my issue here is different.  ALL our intro science labs use Excel, because it is easy; but, they only do very simple analysis with it.  Line fits, no error bars, no spectral analysis, etc.  It is difficult (or impossible) to use to analyze more sophisticated data.  But from the student's perspective, if it is the only tool they know, then it is the tool they will try to use -- with disastrous results.