Put back the components fab function as we can still use it.

IPython/frontend/html/notebook/fabfile.py

@@ -8,6 +8,11 @@ static_dir = 'static'
 components_dir = os.path.join(static_dir,'components')
 
 
+def components():
+   """install components with bower"""
+    with lcd(static_dir):
+        local('bower install')
+
 def css(minify=True):
     """generate the css from less files"""
     if minify not in ['True', 'False', True, False]: