added some answers to SimplePythonData chapter
more SimplePythonData answers
add some answers for Python Turtles chapter
more answers for PythonTurtles
fix bug where codemirror block heights were not set if the codemirror block was in a jQuery tab
more odd answer work
add some comments to the exercise solutions
change some disqus identifiers so they can be used as valid Javascript function names
more odd answers
more odd answers
more odd answers
more odd answers
more odd answers
more odd answers
more odd answers
added some answers to SimplePythonData chapter
more SimplePythonData answers
add some answers for Python Turtles chapter
more answers for PythonTurtles
fix bug where codemirror block heights were not set if the codemirror block was in a jQuery tab