Change supporting organizations

As per #413.
Specific additions:
- Cartoon Network
- Lemann Foundation

src/views/credits/credits.jsx

@@ -244,6 +244,8 @@ var Credits = React.createClass({
                     <a href="http://www.google.org/"> Google</a>,
                     <a href="http://www.legofoundation.com/"> LEGO Foundation</a>,
                     <a href="http://www.intel.com/">Intel Foundation</a>,
+                    <a href="http://www.corusent.com/">Cartoon Network</a>,
+                    <a href="http://www.fundacaolemann.org.br/lemann-foundation/">Lemann Foundation</a>,
                     <a href="https://www.macfound.org/"> MacArthur Foundation</a>.
                 </p>
                 <p>