Merge pull request #107 from martinRenou/rename_index

Rename index + spaces -> underscores

Author: martinRenou

notebooks/index.ipynb renamed to notebooks/00.00-index.ipynb

@@ -26,17 +26,17 @@
     "04. [Widgets in the core ipywidgets package](04.00-widget-list.ipynb)\n",
     "    02. [Output widgets: leveraging Jupyter's display system](04.01-more-on-output-widget.ipynb)\n",
     "05. [Widget Events](05.00-Widget_Events.ipynb)\n",
-    "    01. [*OPTIONAL* Three approaches to events](05.01-OPTIONAL-Widget%20Events%202.ipynb)\n",
-    "    02. [*OPTIONAL* Password generator: `observe`](05.02-OPTIONAL-Widget%20Events%202%20--%20bad%20password%20generator,%20version%201.ipynb)\n",
-    "    03. [*OPTIONAL* Separating the logic from the widgets](05.03-OPTIONAL-Widget%20Events%202%20--%20Separating%20Concerns.ipynb)\n",
-    "    04. [*OPTIONAL* Separating the logic using classes](05.04-OPTIONAL-Widget%20Events%202--Separating%20concerns,%20object%20oriented.ipynb)\n",
+    "    01. [*OPTIONAL* Three approaches to events](05.01-OPTIONAL-Widget_Events_2.ipynb)\n",
+    "    02. [*OPTIONAL* Password generator: `observe`](05.02-OPTIONAL-Widget_Events_2_--_bad_password_generator,_version_1.ipynb)\n",
+    "    03. [*OPTIONAL* Separating the logic from the widgets](05.03-OPTIONAL-Widget_Events_2_--_Separating_Concerns.ipynb)\n",
+    "    04. [*OPTIONAL* Separating the logic using classes](05.04-OPTIONAL-Widget_Events_2--Separating_concerns,_object_oriented.ipynb)\n",
     "06. [Layout and Styling of Jupyter widgets](06.00-layout-and-styling-overview.ipynb)\n",
     "    01. [Layout and Styling of Jupyter widgets](06.01-widget-layout-and-styling.ipynb)\n",
     "    01. [Container Layout Widgets](06.01-widget-layout-and-styling.ipynb#Container-Layout-Widgets)\n",
     "    03. [*OPTIONAL* Widget label styling](06.02-OPTIONAL-widget-label-styling.ipynb)\n",
     "    03. [*OPTIONAL* Predefined widget specific styles](06.03-OPTIONAL-widget-specific-styling.ipynb)\n",
     "    04. [*OPTIONAL* Container exercises](06.00-OPTIONAL-container-exercises.ipynb)\n",
-    "07. [More widget libraries](07.00-More%20widget%20libraries.ipynb)\n",
+    "07. [More widget libraries](07.00-More_widget_libraries.ipynb)\n",
     "    01. [ipyleaflet: Interactive maps](07.01-ipyleaflet.ipynb)\n",
     "    02. [pythreejs: 3D rendering in the browser](07.02-pythreejs.ipynb)\n",
     "    03. [bqplot: complex interactive visualizations](07.03-bqplot.ipynb)\n",
@@ -51,7 +51,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## [Table of widget and style properties](Table%20of%20widget%20keys%20and%20style%20keys.ipynb)"
+    "## [Table of widget and style properties](Table_of_widget_keys_and_style_keys.ipynb)"
    ]
   },
   {