Updating Node and npm versions; adding Github and Wolfram scripts
Update Wolfram module to v0.2.3
Updating hubot version to v2.4.2 and clarifying Node version to use
Revert "Updating hubot version to v2.4.2 and clarifying Node version to use"

This reverts commit b42cce2e7f9d91c0d6236d474ca1bdad125bf84d.
Adding Jira script
Updating hubot to v2.4.7 and clarifying which Node version to use
Adding web script to unmask URLs