Add ipydatagrid/other-libraries notebooks, move old notebooks to widget_libraries folder

Signed-off-by: Itay Dafna <i.b.dafna@gmail.com>

Author: ibdafna

notebooks/07.00-More_widget_libraries.ipynb

@@ -52,9 +52,9 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "widgets-tutorial",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "widgets-tutorial"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {