Refactor Jupyter notebook content and structure (#124)

Updated markdown headers and links, removed execution counts and outputs from code cells.

Author: rcmlz

eg/hello-world.ipynb

@@ -4,168 +4,84 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Welcome to this sample Raku Jupyter notebook!\n",
+    "# Welcome to this sample Raku Jupyter notebook!\n",
     "\n",
     "To run a cell: select it, and press ctrl-return.\n",
     "\n",
     "To add a new empty cell, press the `+` button on the menu bar.\n",
     "\n",
     "To run a cell and add a new one after it: press alt-return.\n",
     "\n",
-    "For documentation about Raku, go to http://docs.raku.org.\n",
+    "For documentation about [Raku](https://raku.org/), go to http://docs.raku.org.\n",
     "\n",
-    "For documentation about this Jupyter Kernel, go to http://github.com/bduggan/p6-jupyter-kernel.\n",
+    "For documentation about this Jupyter Kernel, go to https://github.com/bduggan/raku-jupyter-kernel.\n",
     "\n",
     "Have fun!"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "metadata": {
     "scrolled": true
    },
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "hello, world"
-      ]
-     },
-     "execution_count": 1,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "\"hello, world\""
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "170141183460469231731687303715884105727"
-      ]
-     },
-     "execution_count": 2,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "# To type this, you can type '2 **' and then press tab to help type exponents.\n",
     "my $n = 2¹²⁷ - 1;"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "True"
-      ]
-     },
-     "execution_count": 3,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "# _ refers to the last output\n",
     "is-prime( _ )"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "127"
-      ]
-     },
-     "execution_count": 4,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "( Out[2] + 1).log(2);  # you can also refer to Out[...]"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "[...]"
-      ]
-     },
-     "execution_count": 5,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "my @fib = 1, 1, * + * ... ∞"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "(1 1 2 3 5 8 13 21 34 55 89)"
-      ]
-     },
-     "execution_count": 6,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "@fib[0..10]"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "this goes to stdout\n"
-     ]
-    },
-    {
-     "data": {
-      "text/plain": [
-       "42"
-      ]
-     },
-     "execution_count": 7,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "say \"this goes to stdout\";\n",
     "42 # this is an output expression"
@@ -186,5 +102,5 @@
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }