Bug when is_test == 0

[geofflittle]

future_prices is initialized to None, https://github.com/tradytics/eiten/blob/master/data_loader.py#L51

If is_test is not 1, future_prices doesn't change, https://github.com/tradytics/eiten/blob/master/data_loader.py#L99

future_prices as None is called with .values, https://github.com/tradytics/eiten/blob/master/data_loader.py#L111

[carlgoodier]

yeh, i have same issue