add attribution for column pseudos <http://lists.w3.org/Archives/Public/www-style/2008Dec/0183.html>

Author: fantasai

selectors4/Overview.html

@@ -3157,8 +3157,9 @@ <h2 id=acknowledgements><span class=secno>17. </span> Acknowledgements</h2>
     for this one.
 
    <p>In particular, the working group would like to extend special thanks to
-    the following for their specific contributions to Selectors Level 4:
-    Andrew Fedoniouk Ian Hickson Grey Hodge Jason Cranford Teague
+    the following for their specific contributions to Selectors Level 4: L.
+    David Baron Andrew Fedoniouk Ian Hickson Grey Hodge Jason Cranford Teague
+    
 
    <h2 id=references><span class=secno>18. </span> References</h2>
 

selectors4/Overview.src.html

@@ -2578,6 +2578,7 @@ <h2 id=acknowledgements>
   <p>In particular, the working group would like to extend special
   thanks to the following for their specific contributions to Selectors
   Level 4:
+  L. David Baron
   Andrew Fedoniouk
   Ian Hickson
   Grey Hodge