[Snippets] added usage documentation as a Markdown block in the notebook

Snippets/name-viewer.ipynb

@@ -1,5 +1,19 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## name-viewer.ipynb\n",
+    "\n",
+    "### Usage\n",
+    "\n",
+    "1. Install `jupyter`, `plotly`, `fonttools` dependencies with pip\n",
+    "2. Modify the `FONT_PATH` setting in the Python source block below by clicking next to it and typing a new path in your web browser window\n",
+    "3. Execute the block of Python source by selecting the code block below and clicking the \"Run\" button above\n",
+    "4. Repeat from step 2 with modified font paths to view tables in other fonts\n"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,