move fix thanks a file, update top level html links, rename CONTRIBUTING.md

The fix thank you's have been moved from `README.md` to
`thanks-for-fixes.md`.

**WARNING**: Some mistakes may have been made in doing this.
We presume later changes by others will correct any issues.

The `CONTRIBUTING.md` was renamed `how-to-enter.md`.

A 3rd line of links was added to top level html such as
`contact.html`, `index.html`, `judges.html`, `winners.html`,
and `years.html`.

Improved blank line use in a number (but not all) `README.md` files.

2005/aidan/README.md

@@ -4,12 +4,14 @@ Aidan Thornton
 United Kingdom  
 <makomk@lycos.co.uk>  
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To run:
 
 ```sh
@@ -20,10 +22,6 @@ make
 
 where `seed` is a number.
 
-[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed the test script,
-described by the author in their remarks, to refer to the proper compiled
-program (it's hardcoded) which was never done which broke the script. Thank you
-Cody!
 
 ## Try:
 
@@ -33,6 +31,7 @@ Cody!
 ./aidan 42
 ```
 
+
 ## Judges' remarks:
 
 Are you puzzled about puzzles?  This entry might puzzle you
@@ -311,6 +310,7 @@ that way somehow...
 
 So basically, just what you'd normally expect in an IOCCC entry.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.