Fixed the module number and made a few small changes.

The module number on the slide deck was 2 instead of 3. I also
made a few small changes/extensions to a few slides and the
module outline.
Merge pull request #16 from NicMcPhee/master

Fixed the module number for Module 3 and made a few small changes.
add 4clojure presentation notes
started notes file for in-workshop notes
Merge remote branch 'origin/master'
Update notes.md
Update setup_ubuntu.md

Fixed launch LightTable from command line