[css3-ui] add working on behalf of Bloomberg for Florian in Acks.

Author: tantek

css-ui/Overview.bs

@@ -1442,7 +1442,7 @@ by Tantek Çelik from 1999 to the present,
 first while representing Microsoft, then as an invited expert,
 and most recently while representing Mozilla.
 
-Thanks to <span class="h-card">Florian Rivoal</span> for
+Thanks to <span class="h-card">Florian Rivoal</span>, working on this specification on behalf of Bloomberg, for
 his recent work documenting issues from www-style emails,
 proposing resolutions &amp; changes,
 and in particular for researching &amp; writing greatly

css-ui/Overview.html

@@ -217,7 +217,7 @@
    <h1 class="p-name no-ref" id="title">CSS Basic User Interface Module Level 3 (CSS3 UI)</h1>
 
    <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft,
-    <time class="dt-updated" datetime="2015-05-06">6 May 2015</time></span></h2>
+    <time class="dt-updated" datetime="2015-05-07">7 May 2015</time></span></h2>
 
    <div data-fill-with="spec-metadata">
     <dl>
@@ -3344,7 +3344,7 @@ <h2 class="no-num heading settled" id="acknowledgments"><span class="content">Ap
 and most recently while representing Mozilla.</p>
 
 
-   <p>Thanks to <span class="h-card">Florian Rivoal</span> for
+   <p>Thanks to <span class="h-card">Florian Rivoal</span>, working on this specification on behalf of Bloomberg, for
 his recent work documenting issues from www-style emails,
 proposing resolutions &amp; changes,
 and in particular for researching &amp; writing greatly