fix many internal links

Fixed a number of internal links that need to
go to the GitHub site.

Ran `make www` to perform the above.

1991/westley/README.md

@@ -61,7 +61,7 @@ game:
 ```
 
 The shell script determines when the game is over, and automatically replaces
-`merlyn.c` (copied from [westley.c](westley.c) with an improved version after a
+`merlyn.c` (copied from [westley.c](%%REPO_URL%%/1991/westley/westley.c) with an improved version after a
 loss).  The [ttt](%%REPO_URL%%/1991/westley/ttt.sh) script has two other modes:
 
 ``` <!---sh-->

1991/westley/index.html

@@ -406,7 +406,7 @@ game:</p>
     ./ttt [first_move]  # &lt;- omit first arg to have it move first
     ./ttt next_move</code></pre>
 <p>The shell script determines when the game is over, and automatically replaces
-<code>merlyn.c</code> (copied from <a href="westley.c">westley.c</a> with an improved version after a
+<code>merlyn.c</code> (copied from <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1991/westley/westley.c">westley.c</a> with an improved version after a
 loss). The <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1991/westley/ttt.sh">ttt</a> script has two other modes:</p>
 <pre><code>    ./ttt quitgame      # cancel any game in progress, revert to merlyn.c
     ./ttt clobber       # remove all game files, revert to original source</code></pre>