Use title tag to explain keybindings

index.html

@@ -121,7 +121,7 @@
                 <li>Esc-Esc: disconnect (double-tap)</li>
                 <li>Arrow keys: history navigation</li>
                 <li>Tab key: nick complete</li>
-                <li>The following readline/emacs style keybindings works: Ctrl-a, Ctrl-e, Ctrl-u, Ctrl-k, Ctrl-w</li>
+                <li>The following readline/emacs style keybindings works: <span title="Move cursor to beginning of line">Ctrl-a</span>, <span title="Move cursor to te end of the line">Ctrl-e</span>, <span title="Delete from cursor to beginning of the line">Ctrl-u</span>, <span title="Delete from cursor to the end of the line">Ctrl-k</span>, <span title="Delete from cursor to previous space">Ctrl-w</span></li>
               </ul>
               </div>
             </div>