Revisit 1985 entries

Updated the README.md files.

Renamed shapiro/shapiro.orig.c -> shapiro/shapiro.alt.c. This is one of
the exceptions where we have the alt version as this alt version is not
actually in the archive tarball (there are other exceptions for various
reasons).

1985/august/README.md

@@ -7,11 +7,19 @@ Lennart Augustsson
 
         make all
 
+## To run:
+
+	./august
 
 ## Try:
 
 
-	./august
+	./august | head -n 10
+
+If you have the `primes(6)` tool (sometimes part of BSD Games) you can see
+what of the output in the first N (say 15) lines are primes:
+
+	while read -r n ; do primes "$n" $((n + 1)) ; done < <((./august | head -n 15 ))
 
 
 ## Judges' comments: