[front page] Remove flattr link, rename gittip to gratipay

index.html

@@ -93,8 +93,7 @@
       <div style="position: relative">
         or <span onclick="document.getElementById('bankinfo').style.display = 'block';" class=quasilink>Bank</span>,
         <span onclick="document.getElementById('bcinfo').style.display = 'block';" class=quasilink>Bitcoin</span>,
-        <a href="https://www.gittip.com/marijnh">Gittip</a>,
-        <a href="https://flattr.com/profile/marijnh">Flattr</a><br>
+        <a href="https://gratipay.com/marijnh/">Gratipay</a><br>
         <div id=bankinfo class=bankinfo>
           <span class=bankinfo_close onclick="document.getElementById('bankinfo').style.display = '';">×</span>
           Bank: <i>Rabobank</i><br/>