So, I'm having trouble getting this to work. Whenever I try to run ```initialize_notebook()```, I get the following: 

```

Error in Javascript !
ReferenceError: d3 is not defined
See your browser Javascript console for more details.
Error in Javascript !
SyntaxError: In strict mode code, functions can only be declared at top level or immediately within another function.
See your browser Javascript console for more details.
```
That's not happening on your end? I'm reasonably sure that jquery's ```$.getScript``` needs to be used somewhere in here...