Apply diff2.txt from SF patch http://www.python.org/sf/572113
(with one small bugfix in bgen/bgen/scantools.py)

This replaces string module functions with string methods
for the stuff in the Tools directory. Several uses of
string.letters etc. are still remaining.
diff --git a/Tools/versioncheck/checkversions.py b/Tools/versioncheck/checkversions.py
index 2420611..dcc56d3 100644
--- a/Tools/versioncheck/checkversions.py
+++ b/Tools/versioncheck/checkversions.py
@@ -5,7 +5,6 @@
 import os
 import getopt
 import sys
-import string
 import pyversioncheck
 
 CHECKNAME="_checkversion.py"
@@ -43,7 +42,7 @@
 		sys.exit(1)
 	for o, a in options:
 		if o == '-v':
-			VERBOSE = string.atoi(a)
+			VERBOSE = int(a)
 	if not arguments:
 		arguments = [sys.prefix]
 	for dir in arguments: