[Tutor] file IO tutorial

[Rob Andrews]

http://uselesspython.com/tutorials/PythonFileIOStepByStep.pdf

I've written a quick step-by-step .pdf to walk through the process of
creating a new text file, read from it, and append to it with Python.
It doesn't cover every last thing one can do with opened files, but
does point to a few other resources at the end where the student can
pursue further information.

I'd appreciate if anyone interested would check it over for anything
incorrect, misleading, dangerous, or otherwise in need of amendment.

-Rob
-- 
Golf with an attitude:
http://www.ragingolf.com/