Automatically creating a HOME environ variable on Windows?

[jim.eggleston at gmail.com]

os.path.expanduser('~') is a bit cryptic for non-unix people.
os.path.gethome() or something like that would be nicer. expanduser()
should then call gethome() so the logic is in one place.

It looks like the existing logic in expanduser() is out of date anyway.
It should be updated to use %USERPROFILE% before %HOMEDRIVE% +
%HOMEPATH% .