Error trying to use forecasts in optimisation

[Tom Harvey]

Following along with the README and I get:

info = model.optimize(prices, forecast=forecasts, initial_charge=4)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: optimize() got an unexpected keyword argument 'forecast'

[Tom Harvey]

Looks like a typo in the README

[Tom Harvey]

Fix in #3

[Adam Green]

Thanks :)