Cleanup up activity boxes

[adowling2]

@jkeane14 @E-Ream The updated processing script supports a few types of activity boxes:

• Green boxes starting with <b>Home Activity</b>:
• Green boxes starting with <b>Optional Home Activity</b>:
• Red boxes starting with <b>Tutorial Activity</b>:'
• Blue boxes starting with <b>Class Activity</b>:

Here is the code to add a new note (yellow box):

<div style="background-color: rgba(255,255,0,0.05) ; padding: 10px; border: 1px solid black;"> 
<b>Note</b>: This will add a note.
</div>

You can post here with questions. As you go through the notebooks, you might find some non-standard boxes that should be converted to one of the types listed above or notes.

[adowling2]

@E-Ream Are there any types of activity boxes we should add? Let's discuss here.