Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either
comments, docstrings or error messages. I fixed two minor things in
test_winreg.py ("didn't" -> "Didn't" and "Didnt" -> "Didn't").

There is a minor style issue involved: Guido seems to have preferred English
grammar (behaviour, honour) in a couple places. This patch changes that to
American, which is the more prominent style in the source. I prefer English
myself, so if English is preferred, I'd be happy to supply a patch myself ;)
diff --git a/Modules/resource.c b/Modules/resource.c
index 373e8d2..c0f52cf 100644
--- a/Modules/resource.c
+++ b/Modules/resource.c
@@ -70,8 +70,8 @@
 		ru.ru_msgsnd,		     /* messages sent */
 		ru.ru_msgrcv,		     /* messages received */
 		ru.ru_nsignals,		     /* signals received */
-		ru.ru_nvcsw,		     /* voluntary context switchs */
-		ru.ru_nivcsw		     /* involuntary context switchs */
+		ru.ru_nvcsw,		     /* voluntary context switches */
+		ru.ru_nivcsw		     /* involuntary context switches */
 		);
 }