Almost all translators converted to UTF-8

There are only two translator classes that were not converted to UTF-8: TranslatorJapaneseEn and TranslatorKoreanEn -- i.e. the very special ones, exceptions. It is not clear yet, what was the purpose of the translator classes as they do not contain any human readable string.

New Python 3 script for packing the windows distribution was created in winbuild/ -- not cleaned and not finished yet but the main functionality already works.