Adding ipython_nose for testing in the notebook.
removing extra python files

Conflicts:
	python/flow_control/Readme.md
adding intro python files for lbl
adding python exercise solutions

Updated to remove commit of matplotlib notebook.
Original author: Azalee Bostroem <abostroem@gmail.com>
Original date:   Thu May 9 22:34:10 2013 -0700
adding Azalee's notes from class in StudentNotes_lbnl.ipynb
Adding blank notebooks for software engineering unit.
In class work on testing/program design.
Putting test functions in their own test module too.
Adding mean animals command line script.
Rename the student/presenter notes; I think we also need to clean these files up a bit but I need to double check on that.
Practiced what we preach in the exercise solutions.  Updated the Readme with a hint.
Updated Python Presenter notes for UMass
Updated Student notes for iPython notebook for UMass
Merge branch 'cmu-plus-umass-python-intro-sweng' into 2013-07-cmu

Merging a local branch containing commits cherry-picked from 2013-05-umass that cleans up the
structure of the intro to Python, software engineering, and Python-as-calculator directories,
notebooks, example files, etcetera. These look to be in better shape than what was branched from
master.

Commits to cherry-pick were determined by looking at changes to 2013-05-umass since its common
ancestor with 2013-07-cmu in the appropriate Python directories:

git log --topo-order --format=oneline $(git merge-base 2013-05-umass 2013-07-cmu)..HEAD <path>...

* cmu-plus-umass-python-intro-sweng:
  Updated Student notes for iPython notebook for UMass
  Updated Python Presenter notes for UMass
  Practiced what we preach in the exercise solutions.  Updated the Readme with a hint.
  Rename the student/presenter notes; I think we also need to clean these files up a bit but I need to double check on that.
  Adding mean animals command line script.
  Putting test functions in their own test module too.
  In class work on testing/program design.
  Adding blank notebooks for software engineering unit.
  adding Azalee's notes from class in StudentNotes_lbnl.ipynb
  adding python exercise solutions
  adding intro python files for lbl
  removing extra python files
  Adding ipython_nose for testing in the notebook.
Remove redundant/confusing material related to Python intro, testing, software engineering
Remove umass from names of Python intro notebooks