Format, typo, consistency check YYYY/README.md

There are many fixes made but a few questions remain so when I reach
those years I will address those then. Unfortunately, due to
infrastructure work right now, this is all I can say even though there
are a number of things I'd like to say.

2006/README.md

@@ -8,21 +8,15 @@ on how to compile it and how to run the winning program.
 Look at the winning source and try to figure how it does what it does!
 You may then wish to look at the Author's remarks for even more details.
 
-The IOCCC has a website and now has a number of international mirrors.
-The primary site can be found at [www.ioccc.org](https://www.ioccc.org).
-
-Use `make` to compile entries.  It is possible that on non-Unix / non-Linux
-systems the Makefile needs to be changed.  See the Makefile for details.
+Some ANSI C compilers are not quite as good as they should be.  If
+yours is lacking, you may need to compile using gcc instead of your
+local compiler.
 
 This year we included most of the information included by the submitters
 in the `README.md` files (that were used to build the `index.html` web pages).
 
-Read over the Makefile for compile/build issues.  Your system may require
-certain changes (add or remove a library, add or remove a `#define`).
-
-Some ANSI C compilers are not quite as good as they should be.  If
-yours is lacking, you may need to compile using gcc instead of your
-local compiler.
+The IOCCC has a website and now has a number of international mirrors.
+The primary website can be found at [www.ioccc.org](https://www.ioccc.org).
 
 
 ## Remarks on some of the entries