Fixes in several README.md files

There are many more fixes to be made but I wanted these in. Even the
files I have checked will have to be checked again in more detail but I
needed these committed so I could fix something in another file that
will need a new branch. More updates to README.md files will then be put
into yet another branch if the pull requests have not yet been merged
before I get to these updates (which really ought to be a lot of
fun!  :-) )

1987/lievaart/README.md

@@ -35,8 +35,6 @@ program.  The file lievaart2.c contains what the program would have
 been without the size restriction.  This version has the full end game 
 logic and displays the board after each move!
 
-NOTE: This entry requires a non-standard K&R C compiler to compile.
-
 Copyright (c) 1987, Landon Curt Noll & Larry Bassel.
 All Rights Reserved.  Permission for personal, educational or non-profit use is
 granted provided this this copyright and notice are included in its entirety