Update translation scripts, data.pot files, Ukrainian translation
Remove recreate_all_languages, make readme executable instead.
xgettext: generate valid UTF-8

This version puts UTF-8 into the header, so it should definitely write
UTF-8 encoded strings.
Merge pull request #477 from stefanbeller/master

Improve instructions and script to for translations.
Merge pull request #213 from igorko/master

Update translation scripts, data.pot files, Ukrainian translation
Merge remote-tracking branch 'engine-mainline/master'
update language readme