Fix missing cases of 'web site' to 'website'

... including the index.{md,html} which was in all caps ..

The bin/README.md file (and index.html) was updated slightly with an
added comma: not strictly necessary but for some it might be easier to
read. This was discovered as I was going through the links (not done
checking them yet but so far so good).

index.md

@@ -1,5 +1,5 @@
 <!-- XXX - This entire section goes away during the final stages of the Great Fork Merge -->
-# THIS IS AN EXPERIMENTAL IOCCC WEB SITE
+# THIS IS AN EXPERIMENTAL IOCCC WEBSITE
 
 **IMPORTANT: This is NOT the official IOCCC website!**