More capstone
Background
Merge branch 'master' into capstone

* master:
  first weeks dst
  Rename RR class
  Start updating/cleaning
  Clean up slides/code
  Rename directories to remove numeric prefix
  Fix some typos
  Move slidify to data products
  Start slidifying RR Concepts lecture
Background
Questions to answer
Merge pull request #57 from rdpeng/capstone

Capstone