Fix reinject message issue: do not add Hubot as depency
(http://stackoverflow.com/questions/21707472/why-does-require-give-me-a-new-copy-of-a-module-when-loaded-from-a-different-l)
Merge pull request #2 from bfcamara/fix-reinject-message

Fix reinject message issue: do not add Hubot as dependency