Merge pull request swcarpentry#2 from andypohl/gh-pages

Added notes about the license for the borrowed code.

Author: gonuke

assets/README.md

@@ -1,3 +1,10 @@
 From [a slideshow repo](https://github.com/leemark/better-simple-slideshow):
 * js/better-simple-slideshow.js
-* css/simple-slideshow-styles.css
+* css/simple-slideshow-styles.css
+
+The slideshow code licensed under the Mozilla license, which specifies that 
+the code may be freely distributed and modified as desired, as long as the code
+isn't used in a patented code.  Because this is a web page with open code, 
+a patent license is unnecessary.  In this case the javascript is an unaltered
+copy while the stylesheet has been fudged a little to have a larger caption font 
+on a darker background.