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.

2006/night/README.md

@@ -4,12 +4,14 @@ Christopher Night
 US
 <https://web.archive.org/web/20090415070532/https://www.people.fas.harvard.edu/~night>
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To run:
 
 ```sh
@@ -19,17 +21,17 @@ make
 There is an alternate version that supports arrow keys. See the alternate code
 section below.
 
+
 ## Try:
 
 ```sh
 echo "Do or do not. There is no try."
 ```
 
+
 ### Alternate code:
 
-As [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) is a lost :-) `vim`
-user he took the author's remarks to add support back for arrow keys. To use
-compile like:
+To compile:
 
 
 ```sh
@@ -38,8 +40,6 @@ make alt
 
 Use `night.alt` as you would `night` above.
 
-Thank you Cody!
-
 
 ## Judges' remarks:
 
@@ -55,6 +55,7 @@ There is a nice way to cheat. If you don't want to figure it out you can look at
 (translation from Japanese so it's not perfect)
 <https://mame-github-io.translate.goog/ioccc-ja-spoilers/2006/night.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp>.
 
+
 ## Author's remarks:
 
 Don't worry; this is not a self-reproducing program, as you might at
@@ -146,6 +147,7 @@ following two macros to:
 
 Code on!
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.