Renumbering Tutorials

Hey Jim,

This PR renumbers the rest of the tutorials and folders that were left unchanged to avoid merge conflicts. I've merged in the commits from Mike's PR to incorporate the PubSub messaging tutorial (jhinkey#155), so if you could merge that one first and then this PR, everything should be good with no conflicts.

Once this renumbering is merged into master, we shouldn't have to worry about numbering ever again.  :smiley: