update year level README files

Move copyright notice to the end.

Add a standard comment about the newly added `README.md` files.

Clean up trailing whitespace.

Fixed a few minor typos.

1987/README

@@ -1,10 +1,10 @@
 1987 marked the "The Fourth International Obfuscated C Code Contest"
 
-Copyright (c) 1987, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+
+Look at the README.md file for the given winner for information
+on how to compile the winner and how to run the winning program.
+Look at the winning source and try to figure how it does what it does!
+You may then wish to look at the Author's comments for even more details.
 
 The rules for 1987 suggested even more categories than in 1986.  Hints
 for what to do and not to do were also given in the rules.  For
@@ -19,3 +19,11 @@ published the 1987 winners.  Mark Horton included a version of the 1987
 winners in an appendix of his C book.  The first announcement of
 winners at the Summer 87 Usenix was helped by a small fly that
 danced all over the foils.
+
+=-=
+
+Copyright (c) 1987, Landon Curt Noll & Larry Bassel.
+All Rights Reserved.  Permission for personal, educational or non-profit use is
+granted provided this this copyright and notice are included in its entirety
+and remains unaltered.  All other uses must receive prior permission in writing
+from both Landon Curt Noll and Larry Bassel.