Merge pull request #42 from gvwilson/master

Integrating changes by @rachelslaybaugh and trying to address some remaining issues.
Merge pull request #43 from gvwilson/master

A fresh PDF and an updated Markdown version
Merge branch 'master' of github.com:swcarpentry/iuse2014
Updates to Kaitlin Thaney's bio
Updating Greg's bio