TinyMCE Editor for Course Updates and Handouts

Feel free to test it out @stvstnfrd @caesar2164 @dcadams
This will be easier to read if you put the closing `"""` on a new line
and indent the docstring's contents.

```python
script = """
    var editor = tinyMCE.activeEditor;
    editor.setContent(arguments[0]);
"""
```