IVY-1249: updating the style for the footer

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/branches/2.0.0-rc1@1045287 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/doc/style/style.css b/doc/style/style.css
index ec33e53..b13ae77 100644
--- a/doc/style/style.css
+++ b/doc/style/style.css
@@ -223,6 +223,13 @@
   padding-top: 3px;
 }
 
+.footer {
+  text-align: center;
+  margin-top: 3pt;
+  margin-bottom: 3pt;
+  font-size: 85%;
+}
+
 .comparison td, .comparison th {
     text-align: center;
 }