Unforgiving UTF-8 to ASCII conversion

The bulk loader for App Engine doesn't support unicode (?). Irksome.

Here's a quick and dirty solution if you've got iconv installed.

iconv -c -f UTF-8 -t ASCII utf8_data.csv > ascii_data.csv

Drops unacceptable unicode characters (i.e. anything that doesn't have a direct ASCII match). Did say it was dirty...