Remove unnecessary text from 2020/ferguson1

It's still a lot of text but now it's a bit less to .. uh, swallow. One
file was removed as it really served no purpose other than to make the
documentation longer in a way that is not helpful.

Updated manifest.

Regenerated html files.

tmp/manifest.csv

@@ -4157,7 +4157,6 @@
 2020,ferguson1,.entry.json,4000000000,true,json,true,description of entry in JSON
 2020,ferguson1,gameplay.md,4000000000,true,markdown,true,markdown source for gameplay.html
 2020,ferguson1,.gitignore,4000000000,true,gitignore,true,list of files that should not be committed under git
-2020,ferguson1,halfwidth_vs_fullwidth.png,4000000000,true,image,false,image for bugs.md
 2020,ferguson1,ioccc-cake.jpg,4000000000,true,image,false,image for chocolate cake
 2020,ferguson1,.path,4000000000,false,path,true,directory path from top directory
 2020,ferguson1,spoilers.md,4000000000,true,markdown,true,markdown source for spoilers.html

tmp/path_list.found.txt

@@ -4144,7 +4144,6 @@
 2020/ferguson1/crazy.log.md
 2020/ferguson1/gameplay.html
 2020/ferguson1/gameplay.md
-2020/ferguson1/halfwidth_vs_fullwidth.png
 2020/ferguson1/index.html
 2020/ferguson1/ioccc-cake.jpg
 2020/ferguson1/play.sh

tmp/path_list.manifest.txt

@@ -4144,7 +4144,6 @@
 2020/ferguson1/crazy.log.md
 2020/ferguson1/gameplay.html
 2020/ferguson1/gameplay.md
-2020/ferguson1/halfwidth_vs_fullwidth.png
 2020/ferguson1/index.html
 2020/ferguson1/ioccc-cake.jpg
 2020/ferguson1/play.sh

tmp/path_list.required.txt

@@ -3180,7 +3180,6 @@
 2020/ferguson1/chocolate-cake.md
 2020/ferguson1/crazy.log.md
 2020/ferguson1/gameplay.md
-2020/ferguson1/halfwidth_vs_fullwidth.png
 2020/ferguson1/ioccc-cake.jpg
 2020/ferguson1/play.sh
 2020/ferguson1/prog.2.c