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.

2011/eastman/README.md

@@ -3,18 +3,21 @@
 Peter Eastman  
 <peter.eastman@gmail.com>  
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To run:
 
 ```sh
 ./eastman
 ```
 
+
 ## Try:
 
 Quit the program.  Resize your terminal window.  Run it again.
@@ -25,13 +28,6 @@ Quit the program.  Resize your terminal window.  Run it again.
 
 NOTE: to restore your cursor in your shell, try `reset`.
 
-[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) tested this with
-[macOS Ventura](https://www.apple.com/macos/ventura/) with the M1 chip for
-the author (who tested [OS X 10.7
-(Lion)](https://en.wikipedia.org/wiki/OS_X_Lion) and [fedora
-10](https://fedoraproject.org/wiki/Releases/10/FeatureList)) and reported that
-it works fine.
-
 
 ## Judges' remarks:
 
@@ -46,6 +42,7 @@ size itself to the initial geometry of your terminal.
 If you are ambitious, make the font really small and the window really
 large for hi-res graphics!
 
+
 ## Author's remarks:
 
 This program uses ANSI graphics to recreate the classic Boing Ball demo from
@@ -101,6 +98,7 @@ when I can calculate it from the return value of `usleep()` instead? And I could
 have written `usleep(80000)`, but `usleep(79383)` just looks so much better.
 And so on.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.