Fix most trivially-findable print statements.

There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.

(Oh, and I don't know if the compiler package works.)
diff --git a/Lib/getpass.py b/Lib/getpass.py
index 8204a47..02fe527 100644
--- a/Lib/getpass.py
+++ b/Lib/getpass.py
@@ -67,7 +67,7 @@
 
 
 def default_getpass(prompt='Password: ', stream=None):
-    print >>sys.stderr, "Warning: Problem with getpass. Passwords may be echoed."
+    print("Warning: Problem with getpass. Passwords may be echoed.", file=sys.stderr)
     return _raw_input(prompt, stream)