Added basic scroll to bottom binding for ctrl-l.

IPython/html/static/notebook/js/actions.js

@@ -368,6 +368,15 @@ define(function(require){
                 return env.notebook.scroll_manager.scroll(-1);
             },
         },
+        'recenter-top-bottom': {
+            help: "Move the current cell to the center, top or bottom",
+            handler: function (env, event) {
+                if(event){
+                    event.preventDefault();
+                }
+                return env.notebook.scroll_to_bottom();
+            }
+        },
         'save-notebook':{
             help: "Save and Checkpoint",
             help_index : 'fb',

IPython/html/static/notebook/js/keyboardmanager.js

@@ -79,7 +79,8 @@ define([
             'up'                  : 'ipython.move-cursor-up-or-previous-cell',
             'down'                : 'ipython.move-cursor-down-or-next-cell',
             'ctrl-shift--'        : 'ipython.split-cell-at-cursor',
-            'ctrl-shift-subtract' : 'ipython.split-cell-at-cursor'
+            'ctrl-shift-subtract' : 'ipython.split-cell-at-cursor',
+            'ctrl-l'              : 'ipython.recenter-top-bottom'
         };
     };