This patch replace string module functions with string
methods and removes the "import string" for the stuff
in the Tools directory. A few "import string"
statements are still remaining:

scripts/texi2html.py still uses string.ascii_letters,
string.digits, etc.

modulator/modulator.py still uses string.letters and
string.digits

freeze/win32.html still mentions the string module

idle/AutoExpand.py still uses string.ascii_letters and
string.digits

idle/CallTips.py still uses string.uppercase,
string.lowercase and string.digits

idle/PyShell.py still uses string.ascii_letters and
string.digits

idle/UndoDelegator.py still uses string.ascii_letters
and string.digits

idle/testcode.py still uses string.capwords()