Update some of the 2000 README.md files

I am aware of some entries that do not compile that I haven't even
thought about fixing yet.

I also need to use my linux box to test the X11 entries (this goes for
other years as well) but that'll come at another time as I rarely am at
sitting at that computer. But the README.md files should be in a better
state.

2000/thadgavin/README.md

@@ -1,16 +1,16 @@
 # Most Portable Output:
 
-Thaddaeus Frogley
-Creature Labs
-164 Hornbeams,
-Harlow, Essex,
-UK
+    Thaddaeus Frogley
+    Creature Labs
+    164 Hornbeams,
+    Harlow, Essex,
+    UK
 
-Gavin Buttimore
-Creature Labs
-9 Elizabeth Way,
-Cambridge,
-UK, CB4 1DE
+    Gavin Buttimore
+    Creature Labs
+    9 Elizabeth Way,
+    Cambridge,
+    UK, CB4 1DE
 
 # To build: