Make links on demo page absolute paths to end the madness.

Author: queerviolet

demos/index.jsx

@@ -8,18 +8,18 @@ import Chat from './chat'
 
 const Index = ({children}) => <div>
   <h1>Demos!</h1>
-  <h2><Link to='demos/scratchpad/welcome'>Scratchpad</Link></h2>
+  <h2><Link to='/demos/scratchpad/welcome'>Scratchpad</Link></h2>
   <p>
     The scratchpad is the very simplest React/Firebase demo—a text area
     whose content is synced with Firebase.
   </p>
 
-  <h2><Link to='demos/chat/welcome'>Chat</Link></h2>
+  <h2><Link to='/demos/chat/welcome'>Chat</Link></h2>
   <p>
     A chat room — the canonical Firebase example.
   </p>
 
-  <h2><Link to='demos/whiteboard/welcome'>Whiteboard</Link></h2>
+  <h2><Link to='/demos/whiteboard/welcome'>Whiteboard</Link></h2>
   <p>
     The whiteboard demonstrates the <i>journal</i> pattern, a way to use Firebase
     to synchronize the state of Redux stores on all collaborators machines.