add 'Disk Info.' section to /user/dashboard.html template.

This is just the front-end. The back-end (web.lisp) has not been implemented at
the time of this commit.

templates/user/dashboard.html

@@ -7,7 +7,13 @@
 	    <img class="profile-cat" alt="profile Cat"
 		 src="{% lisp (insert-dashboard-cat)%}">
 	    <h1>{{user.display-name}}</h1>
-	</div>	
+	</div>
+        <p>
+            <strong>Total:</strong> {{disk-info.fourth}} |
+            <strong>Free:</strong> {{disk-info.sixth}} |
+            <strong>Available:</strong> {{disk-info.eighth}} |
+            <strong>Used:</strong> {{disk-info.tenth}}%
+        </p>
     </div>
 
     <div class="be-dashboard-section">