Hotfix/non ascii human name check

reported on websites mailing list: https://lists.fedoraproject.org/pipermail/websites/2013-October/011734.html

The fix is a little looser than the original (it allows digits and symbols as well as letters) but this isn't intended to be a perfect check -- just pre-screen non-legally binding names for spot.  Likely people will either heed the warning message or hit the name override anyway.