Improving Jupyter notebooks in examples/python

[agodemar]

I started working on the "AoA vs CAS.ipynb" example.
Added more context at the beginning of the notebook.
Added more figures taken from JSBSim online reference manual.
Made a first plot of trimmed states with one weight and one x-cg.
Improved the original plot.

[seanmcleod70]

Looks good.

Noticed a typo in the following, the second one should be $V_{max}$.

a minimum speed $V_{min}$ and a maximum $V_{min}$

Also I didn't see any output graphs in the Jupyter notebook - https://github.com/agodemar/jsbsim/blob/master/examples/python/AoA%20vs%20CAS.ipynb

[agodemar]

Also I didn't see any output graphs in the Jupyter notebook - https://github.com/agodemar/jsbsim/blob/master/examples/python/AoA%20vs%20CAS.ipynb

@seanmcleod70 is there a wrong setting that prevents the upload of images embedded in the Jupyter notebook?

[agodemar]

@seanmcleod70 Ok, I'll close this and I'll send another PR.

The example https://github.com/agodemar/jsbsim/blob/master/examples/python/AoA%20vs%20CAS.ipynb now renders correctly.

[agodemar]

Closing and sending a new PR