(35S) spigot algorithm for the digits of PI

[pbnelson]

This was a lot of fun. I used it to compute the first 100 digits of PI in about 15 minutes. It in fact returned 105 digits, the first 103 being correct, and the 104th & 105th digits being wrong (according to Google). I am pretty well flabbergasted that such a small program can give 103 digits of PI correctly in only 15 minutes. Thanks for putting this together.