Update to time zone conversions due to MS updates.

Microsoft updated Windows' time zone information again, creating time zones, renaming them, etc. So, the semi-official conversions between those and the TZ database need to be updated. If the autotesters are up-to-date, then this may fail on the first go round, and I'll have to readd some of the now defunct time zones, but what's here at the moment should be what's on an up-to-date Windows box.
I looked at doing that at one point and decided against it for some reason, though I can't recall why. I do remember that issues with `pure` and `immutable` made it a bit of a pain, but that could probably be worked around, especially since things keep getting better in that department thanks to improvements to inference and implicit conversions from `pure` functions. Regardless, I don't really care which way it is beyond which is more efficient, so I'm fine with changing it.