some es, fr and th localisation files contains UTF8 BOM - repaired

Some es, fr and th localisation files contains UTF8 BOM bytes
(http://en.wikipedia.org/wiki/Byte_order_mark), this creates mysterious
errors because this BOM bytes are returned to browser when these
localisation files are included (only whe MODX cache is empty). Special
problems this makes on custom FormIt validators, because this BOM bytes
are returned in custom validator response! I spend hours to find this
mysterious problem. I discussed this error by jan.tezner@coex.cz.