volest.py changed to: import models. It was: from volatility import models
models init.py changed to: from models.api import *

data is in tests directory thus: data_file_path = '../tests/JPM.csv'

I would add 2 explicit lines after vol. I needed to reference fig, plt not just plt.
fig, plt = vol.cones(windows=windows, quantiles=quantiles)
plt.show()

I could not get vol.term_sheet

@keblu we should update the way people cite the package; check my 3 points added to the github page. I follow David Hsieh practice. We should now push so that people cite our contribution. Please fix the webpage in line with Github. Thx

The code in readme for B-S model has mismatched kwargs names between the function definition and function call inside main.