Minor updates to 1984

Updated 1984/README.md with link to rules.txt.

Updated 1984/decot/README.md removing the note

    NOTE: This entry might not compile when using modern compilers.

as this was redundant (I already added more information in an earlier
commit). As well I moved the header Judges' comments below that note so
that the note about compiling is under the build section of the
README.md.

1984/decot/README.md

@@ -6,15 +6,14 @@ Dave Decot
 
         make all
 
-NOTE: This entry might not compile when using modern compilers.
-
-## Judges' comments:
-
 NOTE: On modern systems this entry requires the option `-traditional-cpp` which
 clang does not support. We thank Yusuke Endoh for his patch which allows the
 entry to compile under gcc! Please be advised that gcc under macOS is actually
 clang so this will not compile with the default gcc under macOS.
 
+## Judges' comments:
+
+
 Some new (in 1984) compilers disliked line 15 of the source, so we changed it
 from: