Added original coffee scripts from hubot/scripts

Summary:
Not all of these work well as is, and I had to modify them, which will
be in a subsequent review.  I wanted to make sure the original though was in
version control.

Test Plan: cross-fingers.

Reviewers: csilvers

Reviewed By: csilvers

Differential Revision: http://phabricator.khanacademy.org/D14263