Updated usernameGen.py

Mike Patterson on the Pauldotcom mailing list commented that he thought usernameGen.py could use handling for middle names.  The template that he suggested was of first initial, middle initial and last name.  I think he’s right.  Originally I had the script avoid middle names or initials, but I went back and added the format Mike requested.

So here it is.  usernameGen-v2.1.txt