2020 feedback

[TomMaullin]

Feedback on 06_scipy:

• need to add %matplotlib inline for plotting
• bug: tol doesn't work for optimize in all python versions

Feedback on 07_plotting_and_images:

• need to add %matplotlib inline for plotting
• add comment distinguishing subplot from subplots
• suggestion: Add seaborn

Potential future plan:

• 08_object_orientated_programming
• 09_neural_networks