Web mapping part 1 (#22)

* wip webmap part 1

* add more webmap

* update web map

* web mapping part 1

Author: mariogiampieri

Tutorials/03_networks.ipynb

@@ -1322,11 +1322,6 @@
                 "\n",
                 "One thing we didn't explore as much here is the idea of *cost* or *weight* associated with traversing between nodes. In our street network example above, we used the `length` of each street segment as the weight for calculating the shortest path. We could just as easily assign other weights, such as travel time, elevation change, degree of sun exposure, etc. Think about the possibilities!"
             ]
-        },
-        {
-            "cell_type": "markdown",
-            "metadata": {},
-            "source": []
         }
     ],
     "metadata": {