Merge pull request #9 from silshack/gh-pages

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Create 2013_09_30_marys_filenamingexercise.md
Update 2013_09_30_marys_filenamingexercise.md
Rename 2013_09_30_marys_filenamingexercise.md to 2013-09-30-marys-filenamingexercise.md
Update 2013-09-30-marys-filenamingexercise.md
Merge pull request #328 from gillenme/gh-pages

Mary's file input/output naming exercise