WARNING: If you send me an unsolicited email related to Sage, I will by default cc my response to one of the public Sage mailing lists (such as sage-support). If you explicitly ask that I don't, then I will not respond to your email. I do this because I feel that I am often not the best person to respond to a Sage question, and I want to give all Sage developers a chance to respond as well. Very, very often, somebody other than me is better qualified to answer a question. -- William