github/teach.github.com — pull request #140 by jordanmccullough (2013-04-28 17:20:35+00:00)
Title: Rename slides, eliminating unfriendly chars from filenames

Removed question marks from slide titles defined with question
marks due to Windows file system issues.

Retained existing "?" in titles by utilizing YAML front matter
for title definition and omitting characters in file name.