Improved style.

gitstats.css

+/**
+ * GitStats - default style
+ */
 body {
 	color: black;
 	background-color: #fff;
 	border: 1px solid black;
 	border-collapse: collapse;
 	font-size: 80%;
+	margin-bottom: 1em;
 }
 
 .vtable {
 }
 
 th {
-	background-color: #eeb;
+	background-color: #ddf;
 }
 
 tr:hover {
-	background-color: #dda;
+	background-color: #ddf;
 }
 
 td {
 	padding-right: 0.2em;
 }
 
+/* Navigation bar; tabbed style */
 .nav {
 	border-bottom: 1px solid black;
 	padding: 0.3em;