Include support to 'utf-8' encoding for data file.
Include support to 'utf-8' encoding for data file.

Char accentuation like 'ã' or 'ç' used to generate some file errors,
like .idml files that can't be open. This fix a lof of those errors,
but stil have some char that keep generating broken .idml files,
like '&'.

goinvo/BatchIDMLGenerator