Initial HelloWorld file
Revert "Initial HelloWorld file"

This reverts commit c8af1cc4a6508047e877067770ee4979b8aba011.
Revert "Revert "Initial HelloWorld file""

This reverts commit 296e0298dfec049903b725912c96fc6ad3e47d46.
added a list
Merge branch 'master' of https://github.com/chalk2/datasciencecoursera