Removed all use of StringIO because it can't handle Unicode characters that can't be encoded using ASCII.  Totally lame.
Removed all use of StringIO because it can't handle Unicode characters that can't be encoded using ASCII.  Totally lame.

yokotoka/prettytable,pombreda/prettytable,djhenderson/prettytable,Reposkeeper/prettytable,kragniz/prettytable,shyjupv/prettytable