First set of modifications for IIRS tutorial.

Added some information on using this with Canopy.  Removed mayavi
slides.  Small changes here and there.
More modifications for IIRS lectures.
Add data and IPython notebooks for IIRS workshop.
Merge branch 'master' of github.com:prabhuramachandran/PyConAPAC2011-tutorials into iirs_2013
Merge pull request #1 from prabhuramachandran/iirs_2013

Merge IIRS changes to master