Begin centralising thank yous to a single file

NOTE: this is just one way to fix the problem described below but it can
be modified - perhaps greatly changed - or rejected and done
differently. That being said it does isolate the entries that can be
modified except for the one by Simon Cooper as I had intended to do all
entries before a commit but I am too tired to continue and there are
more important things to be done for the IOCCC (hopefully later today).
I don't mind but I wanted to save Landon some of the work as I started
the problem even though all with good intention after Landon noted he
wanted to thank those in the README.md files.

First I would like to also apologise to any previous winners if there
was upset or concern; this was all done with the best intentions and I
know that it was a fine line but the judges' goal is to make it so
previous entries do work in modern systems so that everyone can enjoy
them. Still I am sorry if I caused any offence or anything else! I
actually agree with the situation and I had been wondering about how to
go about it too. Now for the rationale behind this update.

A couple previous winners have voiced concern about the way the thank
you notes are displayed in the README.md files I have started the work
to save Landon some of the trouble as although it was with good
intentions (and based on the note that Landon wanted to thank those who
fixed an entry) I started the problem so it seems only right that I help
rectify it. I also agree with the problem and had thought of it before,
even thinking that in some entries it needs not have any reference to
anyone but the winner! This commit has removed the thank you notes from
several entries and added a THANKS.md file.

The THANKS.md file has the rest of the entries that were fixed as well
which should if nothing else help isolate the entries that need to be
modified. Some entries actually referred to me but were not a thank you
note due to a fix; some were from winners themselves for instance.

Note that I did not update the bugs.md file or any other file that might
refer to these things in the README.md files. The bugs.md for instance
refers to adding credits to those who fix problems or provide missing
links or files to the respective README.md files and this will have to
change once the way this is done is finalised. But hopefully this is a
help to Landon so that he may also focus on the important jprint tool in
the mkiocccentry repo.

1990/cmills/README.md

@@ -18,17 +18,6 @@ make all
 ./cmills [starting_cash]
 ```
 
-We used a patch from [Yusuke Endoh](/winners.html#Yusuke_Endoh) to get this to
-work in modern systems (it resulted in a bus error otherwise). Thank you Yusuke
-for your assistance!
-
-[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) made this safer by
-using `fgets()` instead of `gets()`. This avoids an annoying and potentially
-alarming warning at compiling and/or linking and/or runtime that in some cases
-is interspersed with the program's output. Thank you Cody for your assistance!
-
-For the original code see the [1992 archive](/archive/archive-1990.tar.bz2).
-
 
 ## Try:
 

1990/dds/README.md

@@ -12,14 +12,6 @@ make all
 ```
 
 
-[Yusuke Endoh](/winners.html#Yusuke_Endoh) fixed this for modern systems. Thank
-you Yusuke!
-
-[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) removed the erroneous
-prototype to `fopen()` and made this use `fgets()` instead of `gets()` to make
-it safer and to prevent an annoying and potentially alarming warning at
-compiling and/or linking and/or runtime. Thank you Cody for your assistance!
-
 ## To run:
 
 ```sh

1990/jaw/README.md

@@ -25,17 +25,8 @@ US
 make all
 ```
 
-[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed the script to
-work properly in modern environments (to do with PATH not having '.' in it). He
-notes that with an invocation in the try section below will with macOS show
-what appears to be an error message but is actually okay. He gives more
-information in the [bugs.md](/bugs.md) file. Thank you Cody for the help and
-notes!
-
-NOTE: as `btoa` is not common we used a ruby script from [Yusuke
-Endoh](/winners.html#Yusuke_Endoh). Thank you Yusuke for your implementation of
-`btoa`!
-
+NOTE: see the [bugs.md](/bugs.md) file for information on what appears to be a
+bug in macOS but is actually not.
 
 ## Try: