[tz] Rename Ukrainian cities to their official transliterated names

[Paul.Koning at dell.com]

> On Oct 5, 2018, at 1:01 PM, Paul Eggert <eggert at CS.UCLA.EDU> wrote:
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> On 10/4/18 8:36 PM, Phake Nick wrote:
>> I would suggest putting relevant info in the readme or such instead of theory for visibility purpose.
> 
> I drafted some text along those lines, but after a cooling-off period I reread it and it sounded too negative. README is a high-level description of the project that should be welcoming, and putting something in there that boils down to "Don't waste our time trying to rename Asia/Shanghai" is off-putting. Even CONTRIBUTING is mostly too high-level for this sort of thing. However, CONTRIBUTING can suggest that if the contribution might be controversial then one should read theory.html first (and give a URL to theory.html). 

The trouble is that it isn't necessarily obvious to those who haven't been exposed to things that renaming zones might be "controversial".  Perhaps just describe the issue specifically: before proposing zone name changes, read the discussion about zone names in  the theory file.

	paul