Added licence information

Author: pastokes

3. Counting the Lines in a Page.ipynb

@@ -546,6 +546,15 @@
     "\n",
     "This shows an important principle of Digital Humanities. On the face of it, we could count ourselves how many lines there are to a page. However, we can use the software to quickly skim through an entire manuscript in a matter of seconds and to tell us where interesting things are happening, to focus our attention on things that are unusual. If we do this at scale then it can be very useful indeed."
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "---\n",
+    "![Licence Creative Commons](https://i.creativecommons.org/l/by/4.0/88x31.png)\n",
+    "This work (the contents of this Jupyter Python notebook) is licenced under a [Creative Commons Attribution 4.0 International](http://creativecommons.org/licenses/by/4.0/)"
+   ]
   }
  ],
  "metadata": {