locale utf8 issue solved

I was having issues with Python3 related to unicode/utf-8 and found out that locale was not properly in place (haven't tested other environments about this issue but will probably solve many others). It should probably be added at any other level or just for custom buildsteps, just sending the PR in case you think it's good as a general solution.

The problems where found just when trying to print UTF-8 / unicode strings that could not be converted to ASCII. Now a simple 'print("€urope")' will work.