ETS states in report()

[robjhyndman]

It is potentially confusing to not give time indices to the initial states, but to label the seasonal states as s1, s2, ..., sm. I think it would be less confusing if we labelled them l[0], b[0], s[0], s[-1], s[-2], ..., s[-m+1].

[mitchelloharawild]

Improved, thanks.