Update 2013-09-18-CodingBat1.md
Rename sburnham/2013-09-18-CodingBat1.md to _posts/sburnham/2013-09-18-CodingBat1.md

Thanks @eah13 -- should be in the right folder now!
Update 2013-09-18-CodingBat1.md
Merge pull request #289 from sbbreen/gh-pages

Update 2013-09-18-CodingBat1.md