Tidy up session on testing
Merge branch 'staging' of github.com:UCL/rsd-engineeringcourse into staging

* 'staging' of github.com:UCL/rsd-engineeringcourse:
  Insert siteroot: /training/engineering
Slide sections for testing
Fit Testing session into reveal slides

Used to be too big for slides. Should be Ok now. Some the text has been
improved.
remove .py on test names (Mid-lecture fix!)
Remove unused import of abs.
Correct spelling of arbitry
Update 05nose_exercise.md
Update 07debugging.md
Updating to use shared dexy-indigo solution
Use UCL reveal style
Re-add report.latex
Merge pull request #17 from UCL/staging

Staging
Use dexy to generate ipython notebook
Add alternative dexyplugin file for deployment
Fix relative path to indigo
Add script to do deployment
Deploy needs different path to indigo
Session 4, not working
Dexy now passes for session 4, but more work needed