Flush outputs and add xkcd git image

Author: fperez

git-intro-concepts.ipynb

@@ -134,6 +134,15 @@
      "slide_type": "slide"
     }
    },
+   "source": [
+    "## Git is easy!\n",
+    "\n",
+    "<img src=\"images/xkcd-git.png\" width=\"400px\">"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
    "source": [
     "## Very high level picture: an overview of key concepts"
    ]

images/xkcd-git.png

@@ -19,13 +19,6 @@
     "- [Git: collaboration practice](collaboration-exercise.ipynb)\n",
     "- [Git: extras](git-extras.ipynb)"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {