Ukrainian locale added

I've added Ukrainan localisation. 
I wasn't sure about country codes, but http://www.localeplanet.com/icu/uk-UA/ tells that they are uk_ua

I also have two suggestions I'm not sure about:
- Maybe it's better to switch to unicode? UTF-8 strings looks outdated
- Maybe reformat code to match PEP-8? PyCharm can do it almost automatically